3D micro-macro fluid-structure model of pressure relief valve leak tightness

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Controlling and assessing the leak tightness of a Pressure Relief Valve (PRV) has been a challenge since the original design of the product. With more stringent demands from the nu- clear power industry for leakproof PRV’s, closer to the set point, there has been a drive by both industry and academia for a better design method for many known metal-to-metal contacting seal/surface problems. This paper outlines a numerical modelling strategy drawn from industry experience and metrology measurements and investigates the effects of lapping and surface finish on leakage rate. Key influencing parameters of surface form, waviness and roughness are incorporated in the analysis. The numerical approach requires efficient coupling of a non-linear structural Finite Element Analysis (FEA) with a Computational Fluid Dynamic (CFD) solver. This allows the examination of the relationship between deformation of the contacting surfaces, based on the applied spring force, and the resulting micro-flow of gas through any available gaps and the overall leakage to be found. The API527 Seat Tightness methodology is followed to allow leakage rates to be measured and the computational model to be preliminarily validated. Using this model, engineers can adjust and optimise the design of pressure relief valves to find the minimal leakage condition for a given configuration. In addition, the numerical approach can potentially be applied to other metal-to-metal contacting surface components, such as flanges with metal gaskets, and help eliminate leakage.
LanguageEnglish
Title of host publicationASME 2017 Pressure Vessels and Piping Conference
Subtitle of host publicationVolume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD)
Place of PublicationNew York
Number of pages10
Volume5
DOIs
Publication statusPublished - 17 Jul 2017
EventProceedings of the ASME 2017 Pressure Vessels & Piping Conference - Hawaii, United States
Duration: 16 Jul 201720 Jul 2017

Conference

ConferenceProceedings of the ASME 2017 Pressure Vessels & Piping Conference
Abbreviated titlePVP2017
CountryUnited States
CityHawaii
Period16/07/1720/07/17

Fingerprint

Pressure relief valves
Model structures
Macros
Fluids
Metals
Lapping
Industry
Gaskets
Flanges
Seats
Nuclear energy
Seals
Flow of gases
Computational fluid dynamics
Surface roughness
Finite element method
Engineers

Keywords

  • fluid structure model
  • micro-fluids
  • macro-fluids
  • valve leaks

Cite this

Anwar, A. A., Dempster, W. (Ed.), & Gorash, Y. (Ed.) (2017). 3D micro-macro fluid-structure model of pressure relief valve leak tightness. In ASME 2017 Pressure Vessels and Piping Conference: Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD) (Vol. 5). New York. https://doi.org/10.1115/PVP2017-65403
Anwar, Ali A. ; Dempster, William (Editor) ; Gorash, Yevgen (Editor). / 3D micro-macro fluid-structure model of pressure relief valve leak tightness. ASME 2017 Pressure Vessels and Piping Conference: Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD). Vol. 5 New York, 2017.
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title = "3D micro-macro fluid-structure model of pressure relief valve leak tightness",
abstract = "Controlling and assessing the leak tightness of a Pressure Relief Valve (PRV) has been a challenge since the original design of the product. With more stringent demands from the nu- clear power industry for leakproof PRV’s, closer to the set point, there has been a drive by both industry and academia for a better design method for many known metal-to-metal contacting seal/surface problems. This paper outlines a numerical modelling strategy drawn from industry experience and metrology measurements and investigates the effects of lapping and surface finish on leakage rate. Key influencing parameters of surface form, waviness and roughness are incorporated in the analysis. The numerical approach requires efficient coupling of a non-linear structural Finite Element Analysis (FEA) with a Computational Fluid Dynamic (CFD) solver. This allows the examination of the relationship between deformation of the contacting surfaces, based on the applied spring force, and the resulting micro-flow of gas through any available gaps and the overall leakage to be found. The API527 Seat Tightness methodology is followed to allow leakage rates to be measured and the computational model to be preliminarily validated. Using this model, engineers can adjust and optimise the design of pressure relief valves to find the minimal leakage condition for a given configuration. In addition, the numerical approach can potentially be applied to other metal-to-metal contacting surface components, such as flanges with metal gaskets, and help eliminate leakage.",
keywords = "fluid structure model, micro-fluids, macro-fluids, valve leaks",
author = "Anwar, {Ali A.} and William Dempster and Yevgen Gorash",
note = "-1st place winner of Rudy Scavuzzo Student Paper Symposium and 25th Annual PVPD Student Paper Competition -IMECHE conference grant winner",
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Anwar, AA, Dempster, W (ed.) & Gorash, Y (ed.) 2017, 3D micro-macro fluid-structure model of pressure relief valve leak tightness. in ASME 2017 Pressure Vessels and Piping Conference: Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD). vol. 5, New York, Proceedings of the ASME 2017 Pressure Vessels & Piping Conference , Hawaii, United States, 16/07/17. https://doi.org/10.1115/PVP2017-65403

3D micro-macro fluid-structure model of pressure relief valve leak tightness. / Anwar, Ali A.; Dempster, William (Editor); Gorash, Yevgen (Editor).

ASME 2017 Pressure Vessels and Piping Conference: Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD). Vol. 5 New York, 2017.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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T1 - 3D micro-macro fluid-structure model of pressure relief valve leak tightness

AU - Anwar, Ali A.

A2 - Dempster, William

A2 - Gorash, Yevgen

N1 - -1st place winner of Rudy Scavuzzo Student Paper Symposium and 25th Annual PVPD Student Paper Competition -IMECHE conference grant winner

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N2 - Controlling and assessing the leak tightness of a Pressure Relief Valve (PRV) has been a challenge since the original design of the product. With more stringent demands from the nu- clear power industry for leakproof PRV’s, closer to the set point, there has been a drive by both industry and academia for a better design method for many known metal-to-metal contacting seal/surface problems. This paper outlines a numerical modelling strategy drawn from industry experience and metrology measurements and investigates the effects of lapping and surface finish on leakage rate. Key influencing parameters of surface form, waviness and roughness are incorporated in the analysis. The numerical approach requires efficient coupling of a non-linear structural Finite Element Analysis (FEA) with a Computational Fluid Dynamic (CFD) solver. This allows the examination of the relationship between deformation of the contacting surfaces, based on the applied spring force, and the resulting micro-flow of gas through any available gaps and the overall leakage to be found. The API527 Seat Tightness methodology is followed to allow leakage rates to be measured and the computational model to be preliminarily validated. Using this model, engineers can adjust and optimise the design of pressure relief valves to find the minimal leakage condition for a given configuration. In addition, the numerical approach can potentially be applied to other metal-to-metal contacting surface components, such as flanges with metal gaskets, and help eliminate leakage.

AB - Controlling and assessing the leak tightness of a Pressure Relief Valve (PRV) has been a challenge since the original design of the product. With more stringent demands from the nu- clear power industry for leakproof PRV’s, closer to the set point, there has been a drive by both industry and academia for a better design method for many known metal-to-metal contacting seal/surface problems. This paper outlines a numerical modelling strategy drawn from industry experience and metrology measurements and investigates the effects of lapping and surface finish on leakage rate. Key influencing parameters of surface form, waviness and roughness are incorporated in the analysis. The numerical approach requires efficient coupling of a non-linear structural Finite Element Analysis (FEA) with a Computational Fluid Dynamic (CFD) solver. This allows the examination of the relationship between deformation of the contacting surfaces, based on the applied spring force, and the resulting micro-flow of gas through any available gaps and the overall leakage to be found. The API527 Seat Tightness methodology is followed to allow leakage rates to be measured and the computational model to be preliminarily validated. Using this model, engineers can adjust and optimise the design of pressure relief valves to find the minimal leakage condition for a given configuration. In addition, the numerical approach can potentially be applied to other metal-to-metal contacting surface components, such as flanges with metal gaskets, and help eliminate leakage.

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SN - 9780791857984

VL - 5

BT - ASME 2017 Pressure Vessels and Piping Conference

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ER -

Anwar AA, Dempster W, (ed.), Gorash Y, (ed.). 3D micro-macro fluid-structure model of pressure relief valve leak tightness. In ASME 2017 Pressure Vessels and Piping Conference: Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD). Vol. 5. New York. 2017 https://doi.org/10.1115/PVP2017-65403