EP2012061A1 - Chamber dome deflector, combustion chamber comprising the same and gas turbine engine equipped with the same - Google Patents
Chamber dome deflector, combustion chamber comprising the same and gas turbine engine equipped with the same Download PDFInfo
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- EP2012061A1 EP2012061A1 EP08159737A EP08159737A EP2012061A1 EP 2012061 A1 EP2012061 A1 EP 2012061A1 EP 08159737 A EP08159737 A EP 08159737A EP 08159737 A EP08159737 A EP 08159737A EP 2012061 A1 EP2012061 A1 EP 2012061A1
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- Prior art keywords
- combustion chamber
- edge
- chamber
- deflector
- edges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/002—Wall structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/10—Air inlet arrangements for primary air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/50—Combustion chambers comprising an annular flame tube within an annular casing
Definitions
- the present invention relates to the technical field of combustion chambers for gas turbine engine. It is particularly aimed at the bedroom floor. Finally, it relates to a gas turbine engine such as a turbojet engine equipped with such a combustion chamber.
- a divergent conventional combustion chamber is illustrated on the figure 1 , which is an axial section showing a half of the combustion chamber, the other half of which is deduced by symmetry with respect to the axis of the motor (not shown).
- the combustion chamber 110 is housed in a diffusion chamber 130 which is an annular space defined between an outer casing 132 and an inner casing 134, into which is introduced an oxidant, ambient air, compressed coming upstream of a compressor (no represented) via an annular diffusion duct 136.
- This diverging combustion chamber 110 comprises two concentric walls: one external 112 and the other internal 114, which are coaxial and substantially conical. The walls widen from upstream to downstream. The outer 112 and inner 114 walls of the combustion chamber 110 are connected together, upstream of the combustion chamber by a chamber bottom 116.
- the chamber bottom 116 is a frustoconical annular piece, which extends between two substantially transverse planes flaring from downstream to upstream.
- the chamber bottom 116 is connected to each of the two outer wall 112 and inner 114 of the combustion chamber 110.
- the chamber bottom 116 has a small taper. It is equipped with injection systems 118 through which pass injectors 120 which introduce fuel to the upstream end of the combustion chamber 110 where the combustion reactions take place.
- deflectors 122 are interposed between the fireplace and the walls of the chamber bottom.
- These deflectors 122 are substantially flat plates brazed to the chamber bottom 116 with a central opening 122a for the passage of the injection system. They comprise two lateral walls 122b 122c along the radial edges, turned towards the wall of the chamber bottom and two tongues 122e 122f for guiding air along the transverse edges facing the hearth and leaving a space with the walls 114 and 112 , internally respectively external, of the chamber.
- the baffles are cooled by the impacts of cooling air jets entering the combustion chamber 110 through cooling orifices 124 drilled in the chamber bottom 116.
- the air forming these jets, flowing from the upstream downstream, is guided by chamber shrouds 126, passes through the chamber bottom 116 through the cooling orifices, and impinges on the upstream face of the deflectors 122.
- the air is then guided radially inwards and outside the focus to initiate the cooling film of the walls 114 and 112 respectively.
- This guidance along the baffles is provided by the side walls oriented radially. These walls also have a sealing function. By being in contact or by ensuring a minimum clearance with the chamber bottom, They prevent air from coming in between two adjacent baffles, enter the home and disrupt combustion. These disturbances affect pollution and should be avoided. Indeed, the pollutant discharge performance, CO and CHx are likely to be degraded by the parasitic introduction of this cold air particularly at engine idling speed where the game is more important.
- convergent combustion chambers In the context of other engine architectures where the flow of gas is generally convergent between the compressor outlet and the inlet of the turbine, there are so-called convergent combustion chambers, the outer and inner walls of the combustion chamber are inclined by widening from downstream to upstream, and not from upstream to downstream as with the first combustion chambers mentioned above, said divergent. These convergent combustion chambers may have a larger cone angle than the cone angle of the diverging combustion chambers.
- Such a large inclination of the combustion chamber affects the taper of the chamber bottom and the position of the baffles relative to the chamber bottom.
- a combustion chamber is partially illustrated at the figure 2 , in axial section. In this figure appear an axial direction 100 parallel to the axis of the turbojet, the main direction 200 of the combustion chamber 210, and the angle ⁇ between these two axes 100, 200. Due to the significant inclination of the chamber 200, the chamber bottom 216 has a larger taper angle than for a chamber bottom of convergent combustion. When not only the inclination of the chamber bottom 216 is important, but also the injectors 220 are present in reduced number and / or the combustion chamber 210 has a small diameter, it affects the distance between the chamber bottom and flat deflectors.
- the geometry of the chamber bottom can also make difficult the necessary adjustments and tolerances between the bottom wall of the chamber and the baffles.
- the optimal operation of the room is no longer ensured.
- the variation of the clearance between the baffles on the one hand and the baffles and the bottom chamber on the other hand is large enough so that the solution using side walls along the radial edges of the deflectors is no longer satisfactory.
- a combustion chamber bottom deflector of a gas turbine engine comprising a wall portion with an opening for the passage of an injection system of the combustion chamber, two edges longitudinal and two transverse edges, characterized in that at least one of the longitudinal edges comprises a joint cover forming a housing along said edge for an attached tongue or the edge of an adjacent baffle so as to seal the joint between said edge and the edge of an adjacent baffle.
- the solution of the invention is thus to seal the space between the baffles so as not to be dependent on the geometry of the combustion chamber and the chamber bottom in particular and to be able to absorb the dimensional variations related to the operation of the baffle. the room between idle speed and full throttle.
- the present invention also relates to a combustion chamber of an annular gas turbine engine comprising an outer wall, an inner wall, a wall connecting the two walls and constituting a chamber bottom, and a plurality of deflectors according to the invention. with a portion of wall parallel to the chamber bottom, reported in the bottom.
- the baffles are all identical and are mounted on the periphery of the chamber bottom being fixed by the flanges of the openings for the injection systems.
- the joint cover formed by the tongue 10d1 of each of the baffles covers the edge 10'c adjacent deflector 10 'over a width sufficient to accommodate variations in expansion of the combustion chamber.
- Each housing 10d10, 10'd10 is arranged to retain the edge 10c, 10'c of the adjacent baffle such that leaks between two adjacent baffles are reduced or completely eliminated whatever the engine speed.
- the Figures 7, 8 and 9 represent a first variant with a throat seal cover that improves the sealing compared to the previous solution.
- the deflectors 20, 20 ' are seen with a planar wall 20a, 20'a, a central opening 20b, 20'b two longitudinal edges 20c, 20'c and 20d, 20'd and two rounded and curved transverse edges 20e, 20'. e and 20f, 20'f.
- the longitudinal edge 20d comprises a tongue 20d1 parallel to the wall of the baffle and providing a housing 20d10g in the form of a groove. This groove is arranged to cooperate with the edge 20'c of the adjacent deflector.
- the edge 20'c forms a rear recess to engage in the groove 20d10g.
- the game is enough to allow the expansion of the combustion chamber during different engine speeds while maintaining a sealing contact between the edge 20'c and the sides of the groove 20d10g.
- baffles may all be identical or alternate: one with covers joined on both edges and the other with simple edges cooperating with the grooves of the edges with joint covers.
- the Figures 10 and 11 show an improvement between the baffles and the chamber bottom.
- the chamber floor 2 comprises a radial groove 2r in the area where the joint cover of the junction of the baffles is placed. This groove 2 'allows to provide a sufficient gap, when the covers joined are of a greater thickness than the clearance between the flat portion 20a of the baffle and the wall of the chamber bottom.
- baffles 30, 30 ' with a flat wall 30a, 30'a, a central opening 30b, 30'b, two longitudinal edges 30c, 30'c and 30d, 30'd and two transverse edges curved and curved 30e, 30e and 30f, 30'f.
- the two longitudinal edges 30c, 30d; 30'c, 30'd each comprise a tab 30c1, 30d1; 30'c1, 30'd1 parallel to the wall of the baffle and providing a housing 30c10g and 30d10g, 30'c10g, 304d10g shaped throat.
- These grooves are arranged to cooperate with a metal insert tab 31.
- the tongue is housed in the adjacent grooves 30d10g and 30'cl0g. The clearance is sufficient to allow the expansion of the combustion chamber during different engine speeds while maintaining a sealing contact between the edge 20'c and the sides of the groove 20d10g.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Supercharger (AREA)
Abstract
La présent invention porte sur un déflecteur (10) de fond de chambre de combustion d'un moteur à turbine à gaz, comprenant une portion de paroi plane (10a) avec une ouverture pour le passage d'un injecteur de la chambre de combustion, deux bords longitudinaux (10c, 10d) pour l'assemblage à deux déflecteurs adjacents et deux bords transversaux (10e, 10f) caractérisé par le fait qu'au moins l'un des bords comporte un couvre joint (10d1) ménageant un logement (10d10) le long dudit bord pour un bord (10'c) d'un déflecteur adjacent (10') de telle façon à rendre étanche la jonction entre les deux bords tout en permettant leur glissement l'un par rapport à l'autre lorsque la paroi du fond de chambre se dilate. L'invention porte également sur une chambre de combustion incorporant les dits déflecteurs.The present invention relates to a combustion chamber bottom deflector (10) of a gas turbine engine, comprising a flat wall portion (10a) with an opening for the passage of an injector of the combustion chamber, two longitudinal edges (10c, 10d) for the assembly with two adjacent deflectors and two transverse edges (10e, 10f) characterized in that at least one of the edges comprises a joint cover (10d1) providing a housing (10d10) ) along said edge for an edge (10'c) of an adjacent deflector (10 ') so as to seal the junction between the two edges while allowing them to slide relative to each other when the wall of the chamber floor expands. The invention also relates to a combustion chamber incorporating said deflectors.
Description
La présente invention se rapporte au domaine technique des chambres de combustion pour moteur à turbine à gaz. Elle vise en particulier le fond de chambre. Elle vise enfin un moteur à turbine à gaz tel qu'un turboréacteur équipé d'une telle chambre de combustion.The present invention relates to the technical field of combustion chambers for gas turbine engine. It is particularly aimed at the bedroom floor. Finally, it relates to a gas turbine engine such as a turbojet engine equipped with such a combustion chamber.
Dans tout ce qui suit, les termes « axial », « radial », « transversal » correspondent respectivement à une direction axiale, à une direction radiale, et à un plan transversal du moteur, et les termes « amont » et « aval » correspondent respectivement au sens de l'écoulement des gaz dans le moteur.In all that follows, the terms "axial", "radial", "transverse" correspond respectively to an axial direction, to a radial direction, and to a transverse plane of the engine, and the terms "upstream" and "downstream" correspond to respectively in the direction of the flow of gases in the engine.
Une chambre de combustion conventionnelle divergente est illustrée sur la
Cette chambre de combustion divergente 110 comporte deux parois concentriques : l'une externe 112 et l'autre interne 114, qui sont coaxiales et sensiblement coniques. Les parois s'évasent de l'amont vers l'aval. Les parois externe 112 et interne 114 de la chambre de combustion 110 sont reliées entre elles, vers l'amont de la chambre de combustion par un fond de chambre 116.This diverging
Le fond de chambre 116 est une pièce annulaire tronconique, qui s'étend entre deux plans sensiblement transversaux en s'évasant de l'aval vers l'amont. Le fond de chambre 116 se raccorde à chacune des deux parois externe 112 et interne 114 de la chambre de combustion 110. Le fond de chambre 116 présente une faible conicité. Il est doté de systèmes d'injection 118 à travers lesquelles passent des injecteurs 120 qui introduisent du carburant à l'extrémité amont de la chambre de combustion 110 où se déroulent les réactions de combustion.The
Ces réactions de combustion ont pour effet de faire rayonner de la chaleur de l'aval vers l'amont en direction du fond de chambre 116. Ainsi en fonctionnement le fond de chambre est-il soumis à de fortes températures. Afin de le protéger, des écrans thermiques sectorisés, encore appelés déflecteurs 122 sont interposés entre le foyer et les parois du fond de chambre. Ces déflecteurs 122, dont un est représenté sur la
Ce guidage le long des déflecteurs est assuré par les murets latéraux orientés radialement. Ces murets ont aussi une fonction d'étanchéité. En étant au contact ou en assurant un jeu minimal avec le fond de chambre, Ils empêchent l'air de venir s'immiscer entre deux déflecteurs adjacents, pénétrer dans le foyer et perturber la combustion. Ces perturbations ont une incidence sur la pollution et sont à éviter. En effet les performances en rejets de polluants, CO et CHx sont susceptibles d'être dégradées par l'introduction parasite de cet air froid particulièrement au régime de ralenti moteur où le jeu est plus important.This guidance along the baffles is provided by the side walls oriented radially. These walls also have a sealing function. By being in contact or by ensuring a minimum clearance with the chamber bottom, They prevent air from coming in between two adjacent baffles, enter the home and disrupt combustion. These disturbances affect pollution and should be avoided. Indeed, the pollutant discharge performance, CO and CHx are likely to be degraded by the parasitic introduction of this cold air particularly at engine idling speed where the game is more important.
Dans le cadre d'autres architectures de moteurs où le flux de gaz est globalement convergent entre la sortie du compresseur et l'entrée de la turbine, on dispose de chambres de combustion dites convergentes, les parois externe et interne de la chambre de combustion sont inclinées en s'évasant de l'aval vers l'amont, et non pas de l'amont vers l'aval comme avec les premières chambres de combustion mentionnées plus haut, dites divergentes. Ces chambres de combustion convergentes peuvent avoir un angle de cône plus important que l'angle de cône des chambres de combustion divergentes.In the context of other engine architectures where the flow of gas is generally convergent between the compressor outlet and the inlet of the turbine, there are so-called convergent combustion chambers, the outer and inner walls of the combustion chamber are inclined by widening from downstream to upstream, and not from upstream to downstream as with the first combustion chambers mentioned above, said divergent. These convergent combustion chambers may have a larger cone angle than the cone angle of the diverging combustion chambers.
Une inclinaison aussi importante de la chambre de combustion a des répercussions sur la conicité du fond de chambre et sur la position des déflecteurs par rapport au fond de chambre. Une telle chambre de combustion est partiellement illustrée à la
Ainsi la géométrie du fond de chambre peut aussi rendre difficile les ajustements et les tolérances nécessaires entre la paroi du fond de chambre et les déflecteurs. Le fonctionnement optimal de la chambre n'est plus assuré. La variation du jeu entre les déflecteurs d'une part et les déflecteurs et le fond de chambre d'autre part est suffisamment importante pour que la solution mettant en oeuvre des murets latéraux le long des bords radiaux des déflecteurs ne soit plus satisfaisante.Thus the geometry of the chamber bottom can also make difficult the necessary adjustments and tolerances between the bottom wall of the chamber and the baffles. The optimal operation of the room is no longer ensured. The variation of the clearance between the baffles on the one hand and the baffles and the bottom chamber on the other hand is large enough so that the solution using side walls along the radial edges of the deflectors is no longer satisfactory.
La présente invention a pour objectif de remédier à ce problème. Conformément à l'invention on réalise un déflecteur de fond de chambre de combustion d'un moteur à turbine à gaz, comprenant une portion de paroi avec une ouverture pour le passage d'un système d'injection de la chambre de combustion, deux bords longitudinaux et deux bords transversaux, caractérisé par le fait qu'au moins l'un des bords longitudinaux comporte un couvre joint ménageant un logement le long dudit bord pour une languette rapportée ou le bord d'un déflecteur adjacent de façon à rendre étanche la jonction entre ledit bord et le bord d'un déflecteur adjacent.The present invention aims to remedy this problem. According to the invention there is provided a combustion chamber bottom deflector of a gas turbine engine, comprising a wall portion with an opening for the passage of an injection system of the combustion chamber, two edges longitudinal and two transverse edges, characterized in that at least one of the longitudinal edges comprises a joint cover forming a housing along said edge for an attached tongue or the edge of an adjacent baffle so as to seal the joint between said edge and the edge of an adjacent baffle.
La solution de l'invention consiste donc à rendre étanche l'espace entre les déflecteurs de manière à ne pas être tributaire de la géométrie de la chambre de combustion et du fond de chambre en particulier et à pouvoir absorber les variations dimensionnelles liées au fonctionnement de la chambre entre le régime de ralenti et les pleins gaz.The solution of the invention is thus to seal the space between the baffles so as not to be dependent on the geometry of the combustion chamber and the chamber bottom in particular and to be able to absorb the dimensional variations related to the operation of the baffle. the room between idle speed and full throttle.
Différentes solutions sont proposées :
- Le logement est formé par un décrochement de la paroi.
- Le logement est formé d'une gorge.
- Les bords transversaux comprenant une portion de paroi incurvée, les logements sont ménagés également le long des bords longitudinaux de ladite portion incurvée.
- Le déflecteur comprend un couvre joint le long d'un bord longitudinal et un bord sans couvre joint le long de l'autre bord longitudinal les deux bords étant complémentaires pour venir s'adapter à un bord d'un autre même déflecteur disposé bord à bord.
- Le déflecteur comprend un couvre joint le long des deux bords longitudinaux.
- Le déflecteur comprend deux bords longitudinaux complémentaires des couvre joints.
- The housing is formed by a recess of the wall.
- The housing is formed by a gorge.
- The transverse edges comprising a curved wall portion, the housings are also formed along the longitudinal edges of said curved portion.
- The deflector comprises a joint cover along a longitudinal edge and an edge without joint cover along the other longitudinal edge, the two edges being complementary to fit an edge of another same deflector disposed edge to edge .
- The deflector comprises a joint cover along the two longitudinal edges.
- The deflector comprises two longitudinal edges complementary to the joint covers.
La présente invention concerne également une chambre de combustion d'un moteur à turbine à gaz, annulaire comprenant une paroi externe, une paroi interne, une paroi reliant les deux parois et constituant un fond de chambre, et une pluralité de déflecteurs selon l'invention avec une portion de paroi parallèle au fond de chambre, rapportée dans le fond.The present invention also relates to a combustion chamber of an annular gas turbine engine comprising an outer wall, an inner wall, a wall connecting the two walls and constituting a chamber bottom, and a plurality of deflectors according to the invention. with a portion of wall parallel to the chamber bottom, reported in the bottom.
Selon les modes de réalisation :
- Tous les déflecteurs sont identiques ou bien
- les déflecteurs avec couvre joints alternent avec les déflecteurs sans couvre joint.
- Le fond de chambre comprend des rainures radiales ménageant des entrefers entre le fond de chambre et les couvre joints.
- La chambre de combustion est de type convergent.
- All baffles are identical or
- the baffles with joint covers alternate with the baffles without joint covers.
- The bottom chamber includes radial grooves leaving air gaps between the bottom chamber and the covers joint.
- The combustion chamber is of convergent type.
D'autres caractéristiques et avantages ressortiront de la description qui suit de modes de réalisation de l'invention en référence aux dessins annexés sur lesquels :
- La
figure 1 représente en coupe axiale une moitié de chambre de combustion de type divergent en soi connue ; - La
figure 2 représente en coupe axiale une moitié de chambre de combustion de type convergent en soi connue ; - La
figure 3 montre un déflecteur de l'art antérieur utilisé pour la protection thermique de la paroi du fond de chambre de combustion ; - La
figure 4 montre, vus depuis l'intérieur de la chambre de combustion, deux déflecteurs de protection thermique du fond de chambre de l'invention adjacents ; - La
figure 5 montre l'autre face des déflecteurs de lafigure 4 ; - La
figure 6 montre le détail du couvre joint des déflecteurs desfigures 4 et 5 ; - La
figure 7 montre une variante de réalisation de l'étanchéité entre deux déflecteurs adjacents ; - La
figure 8 montre l'autre face des déflecteurs de lafigure 7 ; - La
figure 9 montre le détail du couvre joint des déflecteurs desfigures 7 et 8 ; - La
figure 10 est une vue montrant une rainure radiale ménagée dans la paroi du fond de chambre pour permettre la réalisation d'un entrefer entre la paroi du fond de chambre et le couvre joint des déflecteurs - La
figure 11 montre, vu de dessus en direction radiale, l'entrefer entre la paroi du fond de chambre et le couvre joint à la liaison entre deux déflecteurs adjacents. - La
figure 12 montre une autre variante de réalisation du couvre joint vue depuis l'intérieur de la chambre de combustion ; - La
figure 13 montre le bord d'un déflecteur de lafigure 12 avec une languette - La
figure 14 montre le détail du couvre joint desfigures 12 et 13 . On se reporte maintenant auxfigures 4 à 6 représentant un premier mode de réalisation de l'étanchéité entre deux déflecteurs 10 et 10' en matériau réfractaire disposés côte à côte sur le fond de chambre. Le déflecteur 10 comprend une partieplane 10a avec une ouverture centrale 10b correspondant au logement d'un système d'injection non représenté. Sur lafigure 5 , l'ouverture est bordée d'une collerette 10b1 avec épaulement pour la fixation dans le fond de chambre. Le déflecteur comprend deux bords longitudinaux qui sont orientés selon une direction radiale par rapport à l'axe du moteur, lorsqu'il est en position. Le bord longitudinal 10c et le bord 10d sont rectilignes. Le déflecteur 10 comprend aussi deux bords transversaux10e et 10f à la fois arrondis pour suivre la courbure de la chambre de combustion et incurvés en direction de l'intérieur de la chambre de combustion pour le guidage de l'air. Le bord 10c, à gauche sur lafigure 4 , est rectiligne et suit le profil radial du déflecteur.Le bord 10d de l'autre côté comprend un décrochement arrière par rapport à la face visible sur lafigure 4 , formé par une languette 10d1 qui prolonge la face arrière de la paroi du déflecteur. Ce décrochement forme un logement longitudinal 10d10 pour le bord 10'c du déflecteur adjacent 10'. Ce déflecteur 10' est identique au déflecteur 10. Il comprend une partie plane 10'a, deux bords longitudinaux 10'c et 10'd et deux bords transversaux arrondis et incurvés 10'e et 10'f. Le bord 10'd comprend une languette longitudinale 10'd1 ménageant un logement 10'd10.
- The
figure 1 represents in axial section a divergent type of combustion chamber of known per se; - The
figure 2 represents in axial section a combustion chamber of convergent type known per se; - The
figure 3 shows a deflector of the prior art used for thermal protection of the wall of the combustion chamber bottom; - The
figure 4 shows, seen from inside the combustion chamber, two adjacent thermal protection baffles of the chamber of the invention; - The
figure 5 shows the other side of the deflectors of thefigure 4 ; - The
figure 6 shows the detail of the joint cover of the wind deflectorsFigures 4 and 5 ; - The
figure 7 shows an alternative embodiment of the seal between two adjacent deflectors; - The
figure 8 shows the other side of the deflectors of thefigure 7 ; - The
figure 9 shows the detail of the joint cover of the wind deflectorsFigures 7 and 8 ; - The
figure 10 is a view showing a radial groove formed in the wall of the chamber bottom to allow the realization of an air gap between the wall of the chamber bottom and the joint cover of the baffles - The
figure 11 shows, seen from above in the radial direction, the gap between the wall of the chamber bottom and the cover joined to the connection between two adjacent deflectors. - The
figure 12 shows another embodiment of the joint cover seen from inside the combustion chamber; - The
figure 13 shows the edge of a deflector of thefigure 12 with a tongue - The
figure 14 shows the detail of the joint coverFigures 12 and 13 . We now turn toFigures 4 to 6 showing a first embodiment of the seal between twobaffles 10 and 10 'of refractory material arranged side by side on the chamber bottom. Thedeflector 10 comprises aflat portion 10a with acentral opening 10b corresponding to the housing of a not shown injection system. On thefigure 5 , the opening is bordered by a flange 10b1 with shoulder for fixing in the chamber bottom. The deflector comprises two longitudinal edges which are oriented in a radial direction relative to the axis of the engine, when in position. Thelongitudinal edge 10c and theedge 10d are rectilinear. Thedeflector 10 also comprises two 10e and 10f both rounded to follow the curvature of the combustion chamber and curved towards the interior of the combustion chamber for guiding the air. Thetransverse edges edge 10c, left on thefigure 4 , is rectilinear and follows the radial profile of the deflector. Theedge 10d on the other side comprises a rear recess with respect to the visible face on thefigure 4 formed by a tongue 10d1 which extends the rear face of the wall of the baffle. This recess forms a longitudinal housing 10d10 for the edge 10'c of the adjacent deflector 10 '. This deflector 10 'is identical to thedeflector 10. It comprises a flat portion 10'a, two longitudinal edges 10'c and 10'd and two transverse edges curved and curved 10'e and 10'f. Theedge 10'd comprises a longitudinal tab 10'd1 providing a housing 10'd10.
Sur l'exemple des
Dans la réalisation des
Les
On voit les déflecteurs 20, 20' avec une paroi plane 20a, 20'a, une ouverture centrale 20b, 20'b deux bords longitudinaux 20c, 20'c et 20d, 20'd et deux bords transversaux arrondis et incurvés 20e, 20'e et 20f, 20'f. Le bord longitudinal 20d comprend une languette 20d1 parallèle à la paroi du déflecteur et ménageant un logement 20d10g en forme de gorge. Cette gorge est agencée de manière à coopérer avec le bord 20'c du déflecteur adjacent. Ici le bord 20'c forme un décrochement arrière pour venir s'engager dans la gorge 20d10g. Le jeu est suffisant pour permettre la dilation de la chambre de combustion pendant les différents régimes du moteur tout en conservant un contact d'étanchéité entre le bord 20'c et les flancs de la gorge 20d10g.The
Comme dans la solution précédente les déflecteurs peuvent être tous identiques ou bien alterner : l'un avec des couvre joints sur les deux bords et l'autre avec des bords simples coopérant avec les gorges des bords à couvre joints.As in the previous solution the baffles may all be identical or alternate: one with covers joined on both edges and the other with simple edges cooperating with the grooves of the edges with joint covers.
Les
On a représenté une autre variante sur les
On voit les déflecteurs 30, 30' avec une paroi plane 30a, 30'a, une ouverture centrale 30b, 30'b, deux bords longitudinaux 30c, 30'c et 30d, 30'd et deux bords transversaux arrondis et incurvés 30e, 30'e et 30f, 30'f. Les deux bords longitudinaux 30c, 30d ; 30'c, 30'd comprennent chacun une languette 30c1, 30d1 ; 30'c1, 30'd1 parallèle à la paroi du déflecteur et ménageant un logement 30c10g et 30d10g, 30'c10g, 304d10g en forme de gorge. Ces gorges sont agencées de manière à coopérer avec une languette rapportée métallique 31. Ainsi la languette est logée dans les gorges adjacentes 30d10g et 30'cl0g. Le jeu est suffisant pour permettre la dilation de la chambre de combustion pendant les différents régimes du moteur tout en conservant un contact d'étanchéité entre le bord 20'c et les flancs de la gorge 20d10g.We see the
Claims (14)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0704869A FR2918444B1 (en) | 2007-07-05 | 2007-07-05 | CHAMBER BOTTOM DEFLECTOR, COMBUSTION CHAMBER COMPRISING SAME, AND GAS TURBINE ENGINE WHERE IT IS EQUIPPED |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2012061A1 true EP2012061A1 (en) | 2009-01-07 |
| EP2012061B1 EP2012061B1 (en) | 2016-12-07 |
| EP2012061B2 EP2012061B2 (en) | 2020-06-17 |
Family
ID=39267949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08159737.9A Active EP2012061B2 (en) | 2007-07-05 | 2008-07-04 | Combustion chamber of a gas turbine engine |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US20090019856A1 (en) |
| EP (1) | EP2012061B2 (en) |
| CA (1) | CA2636659C (en) |
| FR (1) | FR2918444B1 (en) |
| RU (1) | RU2498162C2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2943403A1 (en) * | 2009-03-17 | 2010-09-24 | Snecma | TURBOMACHINE COMBUSTION CHAMBER COMPRISING IMPROVED AIR SUPPLY MEANS |
| EP2463583A1 (en) * | 2010-12-06 | 2012-06-13 | Alstom Technology Ltd | Gas turbine and method for reconditioning such a gas turbine |
| FR3064050A1 (en) * | 2017-03-14 | 2018-09-21 | Safran Aircraft Engines | COMBUSTION CHAMBER OF A TURBOMACHINE |
| FR3078384A1 (en) * | 2018-02-28 | 2019-08-30 | Safran Aircraft Engines | DOUBLE BOTTOM CHAMBER COMBUSTION CHAMBER |
| US11300296B2 (en) | 2018-06-04 | 2022-04-12 | Safran Aircraft Engines | Combustion chamber of a turbomachine |
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| US10174949B2 (en) * | 2013-02-08 | 2019-01-08 | United Technologies Corporation | Gas turbine engine combustor liner assembly with convergent hyperbolic profile |
| US9534784B2 (en) * | 2013-08-23 | 2017-01-03 | Pratt & Whitney Canada Corp. | Asymmetric combustor heat shield panels |
| US8984896B2 (en) * | 2013-08-23 | 2015-03-24 | Pratt & Whitney Canada Corp. | Interlocking combustor heat shield panels |
| GB201501817D0 (en) * | 2015-02-04 | 2015-03-18 | Rolls Royce Plc | A combustion chamber and a combustion chamber segment |
| US10041679B2 (en) * | 2015-06-24 | 2018-08-07 | Delavan Inc | Combustion systems |
| US10739001B2 (en) | 2017-02-14 | 2020-08-11 | Raytheon Technologies Corporation | Combustor liner panel shell interface for a gas turbine engine combustor |
| US10718521B2 (en) | 2017-02-23 | 2020-07-21 | Raytheon Technologies Corporation | Combustor liner panel end rail cooling interface passage for a gas turbine engine combustor |
| US10677462B2 (en) | 2017-02-23 | 2020-06-09 | Raytheon Technologies Corporation | Combustor liner panel end rail angled cooling interface passage for a gas turbine engine combustor |
| US10830434B2 (en) | 2017-02-23 | 2020-11-10 | Raytheon Technologies Corporation | Combustor liner panel end rail with curved interface passage for a gas turbine engine combustor |
| US10823411B2 (en) | 2017-02-23 | 2020-11-03 | Raytheon Technologies Corporation | Combustor liner panel end rail cooling enhancement features for a gas turbine engine combustor |
| US10941937B2 (en) | 2017-03-20 | 2021-03-09 | Raytheon Technologies Corporation | Combustor liner with gasket for gas turbine engine |
| US11408609B2 (en) * | 2018-10-26 | 2022-08-09 | Collins Engine Nozzles, Inc. | Combustor dome tiles |
| US11143108B2 (en) | 2019-03-07 | 2021-10-12 | Pratt & Whitney Canada Corp. | Annular heat shield assembly for combustor |
| US11226099B2 (en) * | 2019-10-11 | 2022-01-18 | Rolls-Royce Corporation | Combustor liner for a gas turbine engine with ceramic matrix composite components |
| US12209750B2 (en) * | 2023-02-14 | 2025-01-28 | Collins Engine Nozzles, Inc. | Line replaceable fuel injector panels with single hatch installation |
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| FR2943403A1 (en) * | 2009-03-17 | 2010-09-24 | Snecma | TURBOMACHINE COMBUSTION CHAMBER COMPRISING IMPROVED AIR SUPPLY MEANS |
| US9127841B2 (en) | 2009-03-17 | 2015-09-08 | Snecma | Turbomachine combustion chamber comprising improved means of air supply |
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| FR3078384A1 (en) * | 2018-02-28 | 2019-08-30 | Safran Aircraft Engines | DOUBLE BOTTOM CHAMBER COMBUSTION CHAMBER |
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| US11300296B2 (en) | 2018-06-04 | 2022-04-12 | Safran Aircraft Engines | Combustion chamber of a turbomachine |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130312420A1 (en) | 2013-11-28 |
| FR2918444A1 (en) | 2009-01-09 |
| CA2636659A1 (en) | 2009-01-05 |
| FR2918444B1 (en) | 2013-06-28 |
| US8683806B2 (en) | 2014-04-01 |
| US20090019856A1 (en) | 2009-01-22 |
| EP2012061B2 (en) | 2020-06-17 |
| EP2012061B1 (en) | 2016-12-07 |
| RU2498162C2 (en) | 2013-11-10 |
| RU2008127426A (en) | 2010-01-10 |
| CA2636659C (en) | 2015-10-27 |
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