Fluid pressure penetration for advanced FEA of metal-to-metal seals

Research output: Contribution to journalArticle

Abstract

This numerical study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve in the commercial FE-package ANSYS. The valve geometry is simplified to an axisymmetric problem, which comprises a simple representative geometry consisting of only three components. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. In-service observations show that there is certain limited fluid leakage through the valve seat at operational pressures about 90% of the set pressure, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE-analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap, which is caused primarily by the global plastic deformation of the valve seat. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing.

Fingerprint

Seals
Finite element method
Fluids
Metals
Pressure relief valves
Geometry
Leakage (fluid)
Nonlinear analysis
Nozzles
Plastic deformation

Keywords

  • metal-to-metal seal
  • pressure relief valves
  • fluid pressure penetration
  • FEA
  • axisymmetric problem
  • static face seals

Cite this

@article{9743c9b32f31474e970b032311a67f74,
title = "Fluid pressure penetration for advanced FEA of metal-to-metal seals",
abstract = "This numerical study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve in the commercial FE-package ANSYS. The valve geometry is simplified to an axisymmetric problem, which comprises a simple representative geometry consisting of only three components. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. In-service observations show that there is certain limited fluid leakage through the valve seat at operational pressures about 90{\%} of the set pressure, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE-analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap, which is caused primarily by the global plastic deformation of the valve seat. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing.",
keywords = "metal-to-metal seal, pressure relief valves, fluid pressure penetration, FEA, axisymmetric problem, static face seals",
author = "Yevgen Gorash and William Dempster and Nicholls, {William D.} and Robert Hamilton",
note = "This is the accepted version of the following article: Gorash, Y., Dempster, W., Nicholls, W. D., & Hamilton, R. (2015). Fluid pressure penetration for advanced FEA of metal-to-metal seals. Proceedings in Applied Mathematics and Mechanics, PAMM, 15(1), 197-198., which has been published in final form at https://dx.doi.org/10.1002/pamm.201510089 .",
year = "2015",
month = "10",
day = "21",
doi = "10.1002/pamm.201510089",
language = "English",
volume = "15",
pages = "197--198",
journal = "Proceedings in Applied Mathematics and Mechanics, PAMM",
issn = "1617-7061",
number = "1",

}

Fluid pressure penetration for advanced FEA of metal-to-metal seals. / Gorash, Yevgen; Dempster, William; Nicholls, William D.; Hamilton, Robert.

In: Proceedings in Applied Mathematics and Mechanics, PAMM, Vol. 15, No. 1, 21.10.2015, p. 197-198.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fluid pressure penetration for advanced FEA of metal-to-metal seals

AU - Gorash, Yevgen

AU - Dempster, William

AU - Nicholls, William D.

AU - Hamilton, Robert

N1 - This is the accepted version of the following article: Gorash, Y., Dempster, W., Nicholls, W. D., & Hamilton, R. (2015). Fluid pressure penetration for advanced FEA of metal-to-metal seals. Proceedings in Applied Mathematics and Mechanics, PAMM, 15(1), 197-198., which has been published in final form at https://dx.doi.org/10.1002/pamm.201510089 .

PY - 2015/10/21

Y1 - 2015/10/21

N2 - This numerical study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve in the commercial FE-package ANSYS. The valve geometry is simplified to an axisymmetric problem, which comprises a simple representative geometry consisting of only three components. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. In-service observations show that there is certain limited fluid leakage through the valve seat at operational pressures about 90% of the set pressure, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE-analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap, which is caused primarily by the global plastic deformation of the valve seat. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing.

AB - This numerical study investigates the behaviour of the contact faces in the metal-to-metal seal of a typical pressure relief valve in the commercial FE-package ANSYS. The valve geometry is simplified to an axisymmetric problem, which comprises a simple representative geometry consisting of only three components. A cylindrical nozzle, which has a valve seat on top, contacts with a disk, which is preloaded by a compressed linear spring. Analysis considerations include the effects of the Fluid Pressure Penetration (FPP) across the valve seat which exists at two different scales. In-service observations show that there is certain limited fluid leakage through the valve seat at operational pressures about 90% of the set pressure, which is caused by the fluid penetrating into surface asperities at the microscale. At the macroscale, non-linear FE-analysis using the FPP technique available in ANSYS revealed that there is also a limited amount of fluid penetrating into gap, which is caused primarily by the global plastic deformation of the valve seat. Accurate prediction of the fluid pressure profile over the valve seat is addressed in this study by considering the FPP interaction on both scales. The shape of this pressure profile introduces an additional component of the spring force, which needs to be considered to provide a reliable sealing.

KW - metal-to-metal seal

KW - pressure relief valves

KW - fluid pressure penetration

KW - FEA

KW - axisymmetric problem

KW - static face seals

UR - http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1617-7061/

U2 - 10.1002/pamm.201510089

DO - 10.1002/pamm.201510089

M3 - Article

VL - 15

SP - 197

EP - 198

JO - Proceedings in Applied Mathematics and Mechanics, PAMM

T2 - Proceedings in Applied Mathematics and Mechanics, PAMM

JF - Proceedings in Applied Mathematics and Mechanics, PAMM

SN - 1617-7061

IS - 1

ER -