A computational fluid dynamics evaluation of a pneumatic safety relief valve

W.M. Dempster, W. Elmayyah

Research output: Contribution to conferencePaper

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Abstract

Safety relief valves are well established components preventing catastrophic failure of pressurised systems when non-normal operating conditions occur. However, it is only recently with developments in CFD techniques that the capability to predict the complex flow conditions occurring in the valves has been possible resulting in only limited studies being found in the literature. This paper presents experimental and theoretical investigations applied to a safety relief valve designed for the refrigeration industry but extended here to consider pneumatic systems since air is the compressible fluid. The discharge flow rate and valve forces are determined both theoretically and experimentally for different valve lift conditions and related to the detailed flow conditions (pressure, temperature and Mach number) in the valve predicted by CFD techniques. The CFD code FLUENT has been used with a two dimensional axisymmetric RANS approach using the k-İ turbulent model to predict the highly compressible flow through the valve. The model has been validated by comparison with experimental measurements and the predicted results show good agreement, providing confidence in the use of CFD techniques for valve design and improvement.
Original languageEnglish
Pages92-106
Number of pages14
Publication statusPublished - 27 May 2008
Event13th International Conference on Applied Mechanics and Mechanical Engineering (AMME-13) - Cairo, Egypt
Duration: 27 May 200829 May 2008

Conference

Conference13th International Conference on Applied Mechanics and Mechanical Engineering (AMME-13)
CityCairo, Egypt
Period27/05/0829/05/08

Keywords

  • pneumatics
  • safety relief valves
  • computational fluid dynamics
  • compressible flow

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