CN116026603B - Pressure measurement and sampling device and sampling measurement method - Google Patents
Pressure measurement and sampling device and sampling measurement methodInfo
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- CN116026603B CN116026603B CN202111238843.1A CN202111238843A CN116026603B CN 116026603 B CN116026603 B CN 116026603B CN 202111238843 A CN202111238843 A CN 202111238843A CN 116026603 B CN116026603 B CN 116026603B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a pressure measurement and sampling device and a sampling measurement method, wherein the device comprises a sampling system, a pretreatment system, an analysis system and a sampling system, wherein the sampling system is used for sampling fuel gas, the pretreatment system is used for carrying out mixed pollution discharge test on the sampled fuel gas, or carrying out gas analysis temperature measurement test and total pressure measurement without mixing, or controlling the trend of the fuel gas, the analysis system is used for carrying out pollution discharge index analysis, outlet temperature distribution coefficient analysis (a fuel gas analysis method and a thermocouple method) and total pressure loss coefficient analysis on the fuel gas of the pretreatment system, the sampling system is sequentially connected through a pipeline, and the sampling system obtains the total pressure loss coefficient, the pollution discharge index and the outlet temperature distribution coefficient of a combustion chamber through positive and negative rotation of 180 degrees. Through one-time test, namely, the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained by rotating only +/-180 degrees, the test time is shortened, and the design difficulty of a sampling system is reduced.
Description
Technical Field
The invention belongs to the technical field of aero-engine and gas turbine combustion chamber tests, and particularly relates to a pressure measurement and sampling device and a sampling measurement method.
Background
The total pressure loss coefficient, the pollution emission index, the outlet temperature distribution coefficient and the like of the combustion chamber are the most important performance parameters of the combustion chamber. The total pressure of the combustion chamber is usually measured by a total pressure rake and a pressure scanning valve or a pressure sensor, the pollution emission of the combustion chamber is measured and calculated by a sampling rake and an analyzer, the gas temperature of the combustion chamber is measured by a thermocouple rake and a temperature scanning valve, and the gas temperature of the combustion chamber can also be measured and calculated by the sampling rake and the analyzer. In the full-ring combustion chamber test, a temperature rake, a total pressure rake and a thermocouple rake are usually arranged on a rotary table of a rotary displacement mechanism, and 4 rakes are generally arranged on the rotary table.
There are currently generally 2 schemes to obtain the total pressure loss coefficient, pollution emission index, and outlet temperature distribution coefficient of the full-ring combustor. The first scheme is that 2 rakes are arranged on a rotary table, each of the rakes has 2 rakes, at the moment, the rotary table rotates at an angle of +/-180 degrees, positive signs represent positive rotation and negative signs represent reverse rotation, but the test is stopped in the middle to replace the rakes, and then the test is performed again to obtain the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber, which is equivalent to carrying out 2 tests, and the test time is prolonged. And 3 rakes are arranged on the turntable, wherein 2 rakes are arranged on one of the rakes, and one rake is arranged on the other 2 rakes, so that the rotary displacement mechanism needs to drive the turntable to rotate +/-360 degrees, and the design difficulty of the rotary displacement mechanism is increased.
Disclosure of Invention
The invention aims to overcome the defects of long measurement time and difficult design of a rotary displacement mechanism when the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of a combustion chamber are measured in the prior art, and provides a pressure measurement and sampling device and a sampling method comprising the pressure measurement and sampling device.
The invention solves the technical problems by the following technical scheme:
a pressure measurement and sampling device, comprising:
the sampling system is used for sampling the fuel gas;
the pretreatment system is used for carrying out mixed carrying out a pollution emission test on the sampled fuel gas or carrying out a fuel gas analysis temperature measurement test and total pressure measurement without mixing;
The analysis system is used for carrying out pollution emission index analysis, outlet temperature distribution coefficient analysis and total pressure loss coefficient analysis on the fuel gas of the pretreatment system;
the sampling system, the pretreatment system and the analysis system are sequentially connected through pipelines, and the sampling system obtains the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber through positive and negative rotation by 180 degrees.
In the technical scheme, the pollution emission test is measured by selecting and mixing the fuel gas collected from the sampling system, or the fuel gas analysis temperature measurement test and the total pressure measurement are carried out without mixing, so that the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained by one-time test, namely only rotating +/-180 degrees, and compared with the conventional method, the method reduces the test time and reduces the design difficulty of the sampling system.
Preferably, the sampling system comprises a rotary displacement mechanism, 2 non-mixed sampling rakes and 2 thermocouple rakes, wherein the fuel gas collected by the non-mixed sampling rakes is used for measuring pollution discharge pollution indexes and total pressure loss coefficients, the outlet temperature distribution coefficients are measured by the non-mixed sampling rakes or the thermocouple rakes, and the non-mixed sampling rakes and the thermocouple rakes are respectively arranged on the rotary displacement mechanism at intervals of 90 degrees.
In the technical scheme, 2 non-mixed sampling rakes and 2 thermocouple rakes are arranged on the rotary displacement mechanism, so that the design difficulty of the rotary displacement mechanism is reduced, and the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained through one-time test, and the test time is shortened.
Preferably, the rotary displacement mechanism sequentially completes pollution emission test, gas analysis temperature test, thermocouple temperature test and total pressure measurement through the sequence of forward rotation of 90 degrees, reverse rotation of 90 degrees and forward rotation of 90 degrees.
In the technical scheme, the rotary displacement mechanism only rotates +/-180 degrees, that is to say, one circle of rotation can be collected to obtain the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber through one test, and compared with the prior art, the test time is shortened.
Preferably, the non-mixed sampling rake and the thermocouple rake are both provided with a plurality of sampling ports, the sampling system further comprises a sampling pipe, the sampling ports are connected with the sampling pipe, the sampling pipe is connected with the pretreatment system through a tee-joint type leading-out pipeline, the gas sampled by the non-mixed sampling rake is used as a first group of sampling units, and the gas sampled by the thermocouple rake is used as a second group of sampling units.
In the technical scheme, the sampling system is led out of the pipeline in a tee joint mode, the total pressure measurement is carried out all the way, the gas analysis temperature measurement test is carried out all the way (without passing through the mixer), and the pollution emission test is carried out all the way (with passing through the mixer), so that compared with the prior art, the trouble of replacing the sampling rake is reduced, and the design difficulty of the rotating mechanism is also reduced.
The pretreatment system comprises a pretreatment unit, an electric heat tracing heat preservation pipe, a pretreatment pipeline, an electric heater and a machine box, wherein the sampling pipe is connected with the pretreatment system through the electric heat tracing heat preservation pipe, the electric heat tracing heat preservation pipe is arranged outside the machine box, the pretreatment pipeline and the electric heater are arranged inside the machine box, and the electric heater is used for preserving heat of the pretreatment pipeline.
Preferably, the pretreatment system further comprises a thermocouple compensation wire, the pretreatment unit comprises a first group of pretreatment units and a second group of pretreatment units, the first group of sampling units are communicated with the first group of pretreatment units through the electric tracing thermal insulation pipe and the pretreatment pipeline and used for carrying out gas analysis temperature measurement tests, pollution emission tests and total pressure measurement, and the second group of sampling units are communicated with the second group of pretreatment units through the thermocouple compensation wire and used for carrying out thermocouple temperature measurement tests.
Preferably, the pretreatment system further comprises a mixer, a first group of switch valves, a second group of switch valves, a third group of switch valves and a fourth group of switch valves, wherein the first group of switch valves are used for controlling the mixed gas of the mixer, the second group of switch valves are used for controlling the first group of pretreatment units to conduct total pressure measurement, the third group of switch valves are used for controlling the second group of pretreatment units to conduct gas analysis temperature measurement tests, and the fourth group of switch valves are used for controlling the first group of switch valves to conduct pollution emission tests.
The system comprises a pollution emission analysis system, an outlet temperature distribution system and a pressure analysis system, wherein the pollution emission analysis system comprises a gas component analysis cabinet, the gas component analysis cabinet at least comprises a pipeline, a valve, an air pump, a pressure/temperature/flow meter and an analyzer, the gas component analysis cabinet is used for measuring the volume concentration of each component of gas, at least obtaining a pollution emission index and a gas temperature parameter through calculation, the smoke analysis cabinet at least comprises a pipeline, a filter paper clip, the air pump, the valve and the pressure/temperature/flow meter and is used for measuring the smoke number of the gas, the outlet temperature distribution system comprises a temperature scanning valve and is used for measuring the gas temperature and obtaining a combustion chamber outlet temperature distribution coefficient through calculation, and the pressure analysis system comprises a pressure scanning valve and is used for measuring the gas pressure and obtaining a combustion chamber total pressure loss coefficient through calculation.
Preferably, the analysis system further comprises an instrument gas pipeline valve, and the instrument gas pipeline valve is connected with the pretreatment system and used for controlling an instrument gas blowback sampling pipeline.
In the technical scheme, the instrument gas pipeline valve controls blowback during ignition and before ignition of the combustion chamber so as to prevent fuel oil and other magazines from entering the sampling pipeline when the combustion chamber is not in ignition. And after the test is finished, back blowing is also needed to ensure the cleaning of the sampling pipeline and the test accuracy.
The invention also provides a sampling measurement method, which adopts the pressure measurement and sampling device as set forth in any one of the above, and comprises the following steps;
s1, sequentially connecting a sampling system, a preprocessing system and an analysis system;
S2, adjusting the inlet temperature, pressure and flow of the full-ring combustion chamber to reach a first test state and keep stable;
S3, measuring a temperature field and a total pressure field of the fuel gas acquired by the sampling system through the pretreatment system, and then measuring pollution emission;
S4, analyzing the fuel gas measured by the pretreatment system through the analysis system, and obtaining an outlet temperature distribution coefficient and a total pressure loss coefficient pollution emission index to finish the measurement of the total pressure field, the temperature field and the pollution emission of the full-ring combustion chamber in the first test state;
s5, continuously adjusting the inlet temperature, pressure and flow of the full-ring combustion chamber, and repeating S1-S4 to measure the total pressure field, the temperature field and the pollutant discharge of the outlet of the full-ring combustion chamber until all the measurements are completed after the second test state is reached and the stability is maintained.
Preferably, the sampling system comprises a first set of sampling units and a second set of sampling units;
the sampling system comprises a first group of sampling units and a second group of sampling units;
The pretreatment system comprises a first group of pretreatment units, a second group of pretreatment units, a mixer, a first group of switch valves, a second group of switch valves and a third group of switch valves, wherein the first group of pretreatment units are communicated with the first group of pretreatment units and are used for carrying out gas analysis temperature measurement tests, pollution emission tests and total pressure measurement, the second group of pretreatment units are communicated with the second group of pretreatment units and are used for carrying out thermocouple temperature measurement tests, the first group of switch valves are used for controlling the mixed gas of the mixer and carrying out the pollution emission tests through the fourth group of switch valves, the second group of switch valves are used for controlling the first group of pretreatment units to carry out the total pressure measurement, and the third group of switch valves are used for controlling the first group of pretreatment units to carry out gas analysis temperature measurement tests.
Preferably, the performing of the thermocouple temperature measurement test and the total pressure measurement comprises closing the first group of switch valves and the third group of switch valves, opening the second group of switch valves, and performing the thermocouple temperature measurement test and the total pressure measurement.
Preferably, the method for carrying out the pollution emission measurement and/or the gas analysis temperature measurement test comprises the steps of opening the first group of switch valves and the fourth group of switch valves, closing the second group of switch valves and the third group of switch valves to enable the first group of sampling units to enter the mixer for mixing, carrying out the pollution emission measurement, and/or closing the first group of switch valves, the second group of switch valves and the fourth group of switch valves to open the third group of switch valves and carrying out the gas analysis temperature measurement test.
The invention has the positive progress effects that the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained by arranging 2 non-mixed sampling rakes and 2 thermocouple rakes on the rotary displacement mechanism, so that the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained by one-time test and only rotating the rotary displacement mechanism by +/-180 degrees.
Drawings
FIG. 1 is a schematic diagram showing the arrangement of a pressure measuring and sampling device in embodiment 1 of the present invention;
fig. 2 is a flowchart of a sampling measurement method in embodiment 2 of the present invention.
Reference numerals illustrate:
Electric tracing thermal insulation pipe 1-10
First group of switch valves 11-20
Second group of on-off valves 21-30
Third group of switching valves 31-40
Fourth group of on-off valves 41-42
Meter air line valve 43
Mixer 44
Gas component analysis cabinet 45-49
Smoke analysis cabinet 50
Cabinet 51
Electric heater 52
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, a pressure measurement and sampling device, comprising:
the sampling system is used for sampling the fuel gas;
the pretreatment system is used for carrying out mixed carrying out a pollution emission test on the sampled fuel gas or carrying out a fuel gas analysis temperature measurement test and total pressure measurement without mixing;
The analysis system is used for carrying out pollution emission index analysis, outlet temperature distribution coefficient analysis and total pressure loss coefficient analysis on the fuel gas of the pretreatment system;
the sampling system, the pretreatment system and the analysis system are sequentially connected through pipelines, and the sampling system obtains the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber through positive and negative rotation by 180 degrees.
The method has the advantages that the pollution emission test is measured by selecting and mixing the fuel gas collected from the sampling system, or the fuel gas analysis temperature measurement test and the total pressure measurement are carried out without mixing, so that the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained through one-time test, namely, only rotation of +/-180 degrees, compared with the conventional method, the method has the advantages of reducing the test time and reducing the design difficulty of the sampling system.
The sampling system comprises a rotary displacement mechanism, 2 non-mixed sampling rakes and 2 thermocouple rakes, wherein fuel gas collected by the non-mixed sampling rakes is used for measuring pollution discharge pollution indexes and total pressure loss coefficients, the outlet temperature distribution coefficients are measured by the non-mixed sampling rakes or the thermocouple rakes, and the non-mixed sampling rakes and the thermocouple rakes are respectively arranged on the rotary displacement mechanism at intervals of 90 degrees.
That is, 2 unmixed sampling rake spaced 180 apart, and 2 thermocouple rake spaced 180 apart.
The rotary displacement mechanism sequentially completes pollution emission test, gas analysis temperature measurement test and total pressure measurement through the sequence of forward rotation 90 degrees, reverse rotation 90 degrees and forward rotation 90 degrees.
In this embodiment, 2 unmixed sampling harrows have 10 sampling ports altogether, and sampling system still includes the sampling tube the sampling port with the sampling tube is connected, draws forth the pipeline through the tee bend mode on the sampling tube and is connected with preprocessing system, the gas that the unmixed sampling harrow was sampled is as first group sampling unit, the gas that the thermocouple harrow was sampled is as second group sampling unit.
The pretreatment system comprises a pretreatment unit, electric tracing thermal insulation pipes 1-10, thermocouple compensation wires (not shown in the figure), an electric heater 52 and a case 51, wherein the sampling pipes are connected with the pretreatment system through the electric tracing thermal insulation pipes 1-10, the electric tracing thermal insulation pipes are arranged outside the case 51, the pretreatment pipeline and the electric heater 52 are arranged inside the case 51, and the electric heater 52 is used for carrying out 160 ℃ thermal insulation on the pretreatment pipeline.
The pretreatment unit comprises a first group of pretreatment units and a second group of pretreatment units, wherein the first group of sampling units are communicated with the first group of pretreatment units through electric tracing heat insulation pipes 1-10 and are used for carrying out gas analysis temperature measurement tests, pollution emission measurement and total pressure measurement, and the second group of sampling units are communicated with the second group of pretreatment units through thermocouple compensation wires and are used for carrying out thermocouple temperature measurement tests. Specifically, the second set of sampling units is connected to a temperature scanning valve (not shown) in the analysis system via thermocouple compensation wires to measure the gas temperature. The thermocouple temperature measurement test was performed without mixing.
The pretreatment system further comprises a mixer 44, a first group of switch valves 11-20, a second group of switch valves 21-30, a third group of switch valves 31-40 and a fourth group of switch valves 41-42, wherein the first group of switch valves 11-20 are used for controlling the mixed gas of the mixer 44 and carrying out pollution discharge tests through the fourth group of switch valves 41-42, the second group of switch valves 21-30 are used for controlling the first group of pretreatment units to carry out total pressure measurement, and the third group of switch valves 31-40 are used for controlling the second group of pretreatment units to carry out gas analysis temperature measurement tests.
The analysis system comprises a pollution emission analysis system, an outlet temperature distribution system and a pressure analysis system, wherein the pollution emission analysis system comprises a gas component analysis cabinet 45-49, a smoke analysis cabinet 50, a smoke analysis cabinet and a pressure/temperature/flow measurement instrument, wherein the gas component analysis cabinet comprises a pipeline, a valve, an air pump, a pressure/temperature/flow measurement instrument, an analyzer and the like, and is used for measuring the volume concentration of each component of gas, and the pollution emission index, the gas temperature parameter and the like can be obtained through calculation;
the outlet temperature distribution system includes a temperature scanning valve (not shown) for analyzing the full-ring combustor outlet temperature distribution and obtaining a combustor outlet temperature distribution coefficient through calculation.
The pressure analysis system comprises a pressure scanning valve for measuring the pressure of the fuel gas and obtaining the total pressure loss coefficient of the combustion chamber through calculation.
The meter gas line valve 43 is connected to the outside of the casing 51 for controlling blowback of the sampling line, specifically, the meter gas line valve 43 controls blowback at the time of ignition of the combustion chamber and before ignition to prevent a fuel oil or the like from entering the sampling line when the combustion chamber is not ignited. And after the test is finished, back blowing is also needed to ensure the cleaning of the sampling pipeline and the test accuracy.
Example 2
As shown in fig. 2, the present embodiment provides a sampling measurement method, which adopts the pressure measurement and sampling device as in embodiment 1, comprising the steps of:
s1, sequentially connecting a sampling system, a preprocessing system and an analysis system;
S2, adjusting the inlet temperature, pressure and flow of the full-ring combustion chamber to reach a first test state and keep stable;
S3, measuring a temperature field and a total pressure field of the fuel gas acquired by the sampling system through the pretreatment system, and then measuring pollution emission;
S4, analyzing the fuel gas measured by the pretreatment system through the analysis system, and obtaining an outlet temperature distribution coefficient and a total pressure loss coefficient pollution emission index to finish the measurement of the total pressure field, the temperature field and the pollution emission of the full-ring combustion chamber in the first test state;
s5, continuously adjusting the inlet temperature, pressure and flow of the full-ring combustion chamber, and repeating S1-S4 to measure the total pressure field, the temperature field and the pollutant discharge of the outlet of the full-ring combustion chamber until all the measurements are completed after the second test state is reached and the stability is maintained.
The sampling system comprises a first group of sampling units and a second group of sampling units.
The pretreatment system comprises a first group of pretreatment units and a second group of pretreatment units, wherein the first group of pretreatment units are communicated with the first group of pretreatment units and are used for carrying out gas analysis temperature measurement tests, pollution emission tests and total pressure measurement, and the second group of pretreatment units are communicated with the second group of pretreatment units and are used for carrying out thermocouple temperature measurement tests.
The pretreatment system further comprises a mixer 44, a first group of switch valves 11-20, a second group of switch valves 21-30, a third group of switch valves 31-40 and a fourth group of switch valves 41-42, wherein the first group of switch valves 11-20 are used for controlling the mixed gas of the mixer 44 and carrying out pollution discharge tests through the fourth group of switch valves 41-42, the second group of switch valves 21-30 are used for controlling the first group of pretreatment units to carry out total pressure measurement, and the third group of switch valves 31-40 are used for controlling the first group of pretreatment units to carry out gas analysis temperature measurement tests.
Developing the thermocouple temperature test and the total pressure measurement includes closing the first set of on-off valves 11-20 and the third set of on-off valves 31-43, and opening the second set of on-off valves 21-30 such that the first set of preprocessing units develop the total pressure measurement based on the first set of sampling units. The sample air flow at the outlet of the 2 sampling harrows enters the pressure scanning valve through the electric tracing heat insulation pipe 1-10 and the second group of switch valves 21-30 to measure the total pressure, at the moment, the rotation angle of each time of the rotary displacement mechanism is determined according to the measurement point density required by the test, the rotary displacement mechanism firstly rotates forward by 90 degrees in a rotating-stopping-rotating mode, then rotates continuously and reversely by 90 degrees to return to the normal position, then rotates continuously and rotates forward by 90 degrees to return to the normal position in a rotating-stopping-rotating mode, and the whole thermocouple temperature measurement test and total pressure measurement are completed. It should be noted that the thermocouple temperature measurement test is suitable for the case that the outlet temperature of the full-ring combustion chamber is lower than 1800 ℃.
Performing the pollution emission measurement includes opening the first set of on-off valves 11-20 and the fourth set of on-off valves 41-42, closing the second set of on-off valves 21-30 and the third set of on-off valves 31-40 such that the second set of sampling units enter the mixer 44 for mixing, and performing the pollution emission measurement. The sample gas at the outlet of the 2-branch sampling rake flows through the electric tracing thermal insulation pipe 1-10 and the first group of switch valves 11-20 and then enters the mixer 44 for mixing, the mixed sample gas enters the gas component analysis cabinet 45 for measuring gaseous pollutants after passing through the switch valve 42, and the mixed sample gas enters the smoking analysis cabinet 50 for measuring smoking after passing through the switch valve 41. The measurement of the total pressure field, the temperature field and the pollution emission of the full-ring combustion chamber in the first test state is completed, and the total pressure loss coefficient, the outlet temperature distribution coefficient and the pollution emission index of the combustion chamber can be obtained through calculation.
When the temperature field and the total pressure field are measured, the rotary displacement mechanism performs measurement in a 'turn-stop-turn' mode, and when the pollution emission is measured, the rotary displacement mechanism continuously rotates and can complete measurement in a few minutes, so that the time is less compared with the time for measuring the temperature field and the total pressure field.
It should be emphasized that when the outlet temperature of the full-ring combustor is higher than 1800 ℃, the gas temperature needs to be measured by adopting a gas analysis method, and the thermocouple rake on the rotary displacement mechanism needs to be replaced by a non-mixed sampling rake, that is to say, 4 non-mixed sampling rakes are used on the rotary displacement mechanism, at this time, the rotation angle of the rotary displacement mechanism is +/-90 ℃,5 sampling holes are formed in each sampling rake, and 2 sampling rakes exactly correspond to 10 sampling pipes. The working principle is as follows:
The method comprises the steps of firstly closing a first group of switch valves 11-20, a second group of switch valves 21-30, a third group of switch valves 31-40, a fourth group of switch valves 41-42 and an instrument gas pipeline valve 43, opening the switch valves 21-25, enabling sample gas at the outlet of a 1 st sampling rake to enter a gas component analysis cabinet 45-49 for gas component measurement after passing through an electric tracing thermal insulation pipe 1-5 and the switch valves 21-25, obtaining 5-point temperature at the position of the 1 st sampling rake through calculation, then opening the switch valves 36-40, closing the switch valves 31-35, enabling sample gas at the outlet of the 2 nd sampling rake to enter the gas component analysis cabinet 45-49 for gas component measurement after passing through 6-10 in the electric tracing thermal insulation pipe and the switch valves 36-40, and obtaining 5-point temperature at the position of the 2 nd sampling rake through calculation. So far, the 10-point temperature of the position of the current 2-branch sampling rake is measured, the displacement mechanism is rotated to the second position continuously according to the requirement, and the 10-point temperature of the second position of the 2-branch sampling rake can be obtained by measuring according to the method. The temperature at the rest of the positions is carried out in sequence as described above.
For the measurement of the temperature by the gas analysis method, the thermocouple rake can be replaced by a non-mixed sampling rake, and if the thermocouple rake is not replaced by the non-mixed sampling rake, the rotation angle of the rotary displacement mechanism is +/-180 degrees. And pollution emission measurement, total pressure measurement, thermocouple temperature measurement and gas analysis temperature measurement can be carried out in one test, so that the test time is prolonged compared with an alternative scheme.
In summary, by installing 2 non-mixed sampling rakes and 2 thermocouple rakes on the rotary displacement mechanism in the sampling and measuring device, the total pressure loss coefficient, the pollution emission index and the outlet temperature distribution coefficient of the combustion chamber can be obtained by one test and only rotating the rotary displacement mechanism by +/-180 degrees, and compared with the conventional method, the method reduces the test time and the design difficulty of the rotary displacement mechanism.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (12)
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8418817D0 (en) * | 1984-07-24 | 1984-08-30 | Secr Defence | Combustion gas sampler and conditioner |
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| CN105675158A (en) * | 2016-01-06 | 2016-06-15 | 南京航空航天大学 | Device and method for simultaneously measuring gas turbine combustion chamber outlet temperature and combustion product concentration |
| CN206515062U (en) * | 2017-02-10 | 2017-09-22 | 中国航发沈阳发动机研究所 | A kind of combustion chamber measurement apparatus disk cover |
| CN108982744A (en) * | 2018-05-07 | 2018-12-11 | 西北工业大学 | Combustion gas sampling rake and fuel gas analysis system and method suitable for aircraft engine |
| US11143644B2 (en) * | 2018-06-22 | 2021-10-12 | Avl Test Systems, Inc. | System and method for determining a contamination level in an emissions measurement device or system |
| CN209148173U (en) * | 2018-11-30 | 2019-07-23 | 浙江大学 | A kind of thermocouple integrating device for measure annular combustor exit temperature |
| RU2755450C1 (en) * | 2020-08-10 | 2021-09-16 | Публичное акционерное общество "ОДК-Уфимское моторостроительное производственное объединение" (ПАО "ОДК-УМПО") | Method for providing strength of turbine of gas turbine engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB8418817D0 (en) * | 1984-07-24 | 1984-08-30 | Secr Defence | Combustion gas sampler and conditioner |
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