Projects per year
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.
Original language | English |
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Title of host publication | ASME 2017 Pressure Vessels and Piping Conference |
Subtitle of host publication | Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD) |
Place of Publication | New York |
Number of pages | 10 |
Volume | 5 |
DOIs | |
Publication status | Published - 17 Jul 2017 |
Event | Proceedings of the ASME 2017 Pressure Vessels & Piping Conference - Hawaii, United States Duration: 16 Jul 2017 → 20 Jul 2017 |
Conference
Conference | Proceedings of the ASME 2017 Pressure Vessels & Piping Conference |
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Abbreviated title | PVP2017 |
Country/Territory | United States |
City | Hawaii |
Period | 16/07/17 → 20/07/17 |
Keywords
- fluid structure model
- micro-fluids
- macro-fluids
- valve leaks
Fingerprint
Dive into the research topics of '3D micro-macro fluid-structure model of pressure relief valve leak tightness'. Together they form a unique fingerprint.Projects
- 2 Finished
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Project 3.7: Investigation and model development of valve leak tightness
Anwar, A., Gorash, Y., Dempster, W., Hamilton, R. & Nash, D.
24/06/14 → 24/06/17
Project: Knowledge Exchange
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N1a: Leak Tightness in Safety Valves
Gorash, Y., Dempster, W., Hamilton, R. & Nicholls, W.
1/03/12 → 31/07/13
Project: Knowledge Exchange
Equipment
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Alicona Measurement
Margo Hutchison (Manager)
Advanced Forming Research CentreFacility/equipment: Equipment
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Deformed gap space using macro-micro FEA model and transferred into a CFD model
Anwar, A., Gorash, Y., Dempster, W. & Nash, D., 26 Oct 2016, (E-pub ahead of print) In: Proceedings in Applied Mathematics and Mechanics, PAMM. 16, 1, 2 p., 61264.Research output: Contribution to journal › Article › peer-review
Open AccessFile78 Downloads (Pure) -
Application of multiscale approaches to the investigation of sealing surface deformation for the improvement of leak tightness in pressure relief valves
Anwar, A. A., Gorash, Y. & Dempster, W., 13 May 2016, Advanced Methods of Continuum Mechanics for Materials and Structures. Naumenko, K. & Aßmus, M. (eds.). Singapore: Springer, Vol. 60. p. 493-522 30 p. (Advanced Structured Materials; vol. 60).Research output: Chapter in Book/Report/Conference proceeding › Chapter
Open AccessFile5 Citations (Scopus)43 Downloads (Pure) -
Microflow leakage through the clearance of a metal-metal seal
Anwar, A. A., Ritos, K., Gorash, Y., Dempster, W. & Nash, D., 23 Mar 2016, (Accepted/In press). 5 p.Research output: Contribution to conference › Paper › peer-review
Open AccessFile