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FR2269699A1 - Helical turbulence generator for heat exchanger tubes - is made from helically twisted straight long strip - Google Patents

Helical turbulence generator for heat exchanger tubes - is made from helically twisted straight long strip

Info

Publication number
FR2269699A1
FR2269699A1 FR7512297A FR7512297A FR2269699A1 FR 2269699 A1 FR2269699 A1 FR 2269699A1 FR 7512297 A FR7512297 A FR 7512297A FR 7512297 A FR7512297 A FR 7512297A FR 2269699 A1 FR2269699 A1 FR 2269699A1
Authority
FR
France
Prior art keywords
helix
turbulence generator
diameter
heat exchanger
helical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7512297A
Other languages
French (fr)
Other versions
FR2269699B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Mahle Behr GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr GmbH and Co KG, Mahle Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of FR2269699A1 publication Critical patent/FR2269699A1/en
Application granted granted Critical
Publication of FR2269699B1 publication Critical patent/FR2269699B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The turbulence generator is made by helical twisting of a long narrow thin strip of material, and is fitted into a heat exchanger tube for improving heat transfer as a relatively simple and effective passive turbulence generator. The helix diameter is up to three percent smaller than the inside diameter of the enclosing tube. The ratio of the helix pitch and the diameter of the helix is between two and five. The strip thickness is about one to fifteen percent of the helix diameter. For approximately equal heat transfer performance, this helical strip causes an appreciably lower pressure drop than observed on using different internal fittings. The helix is not centered by additional components in the tube because the flow itself centers it correctly.
FR7512297A 1974-05-03 1975-04-21 Helical turbulence generator for heat exchanger tubes - is made from helically twisted straight long strip Granted FR2269699A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742421519 DE2421519A1 (en) 1974-05-03 1974-05-03 HELICAL TURBULENCE INSTALLATION

Publications (2)

Publication Number Publication Date
FR2269699A1 true FR2269699A1 (en) 1975-11-28
FR2269699B1 FR2269699B1 (en) 1978-10-13

Family

ID=5914619

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7512297A Granted FR2269699A1 (en) 1974-05-03 1975-04-21 Helical turbulence generator for heat exchanger tubes - is made from helically twisted straight long strip

Country Status (3)

Country Link
BR (1) BR7502664A (en)
DE (1) DE2421519A1 (en)
FR (1) FR2269699A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436959A1 (en) * 1978-09-19 1980-04-18 Ferodo Sa Helical insert for heat exchanger tubes - has S=shaped cross=section with reinforced core to create turbulent flow

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19718064B4 (en) * 1997-04-29 2005-02-10 Behr Gmbh & Co. Kg turbulence insert
DE102007011203A1 (en) * 2007-03-06 2008-09-11 Schako Klima Luft Ferdinand Schad Kg Zweigniederlassung Kolbingen Pipe for delivery of heat to a room, or removal of heat from the room has elongated insert with radial vanes
JP2018089937A (en) * 2016-12-07 2018-06-14 化成工業株式会社 Spiral laminar structure and production method of spiral laminar structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436959A1 (en) * 1978-09-19 1980-04-18 Ferodo Sa Helical insert for heat exchanger tubes - has S=shaped cross=section with reinforced core to create turbulent flow

Also Published As

Publication number Publication date
DE2421519A1 (en) 1975-11-13
FR2269699B1 (en) 1978-10-13
BR7502664A (en) 1976-03-16

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Legal Events

Date Code Title Description
ST Notification of lapse