On the Leak Through a Spiral-Groove Metallic Static Ring Gasket

[+] Author and Article Information
S. Geoffroy, M. Prat

Institut de Mécanique des Fluides de Toulouse, UMR CNRS-INP/UPS No. 5502 avenue du Professeur Camille Soula 31400 Toulouse, France

J. Fluids Eng 126(1), 48-54 (Feb 19, 2004) (7 pages) doi:10.1115/1.1637627 History: Received June 18, 2003; Revised September 11, 2003; Online February 19, 2004
Copyright © 2004 by ASME
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Schematic illustration of a machine turned static ring gasket
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Schematic illustration of the crest and valley height fluctuations
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Model static ring gasket. The ring width Δr is grossly exaggerated for clarity. The thin inner solid line shows the spiral crest. The inner dashed line shows the bottom of the spiral valley. The local slopes are also exaggerated (in fact a/λ≪1).
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For ε<0, a simple geometric erosion rule is used as depicted in the figure
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Radial and circumferential fluxes as a function of ε. (a) diffusive fluxes, (b) viscous fluxes.
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Total flux (radial+circumferential) as a function of ε. (a) diffusive flux, (b) viscous flux.
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Evolution of K*/D* as a function of ε
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Schematic view of the model ring gasket with error of form on the top surface. Dimensions within the ring as well as local slopes are grossly exaggerated for clarity.
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“Unrolled” view of contact area (in black) and aperture field for the system with error of form. Constrictions along the circumferential and radial paths are shown. For ε<−2α, only a circumferential leak is possible as shown in εcd (b).
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Influence of an error of form on the flow rate through the ring gasket. A is the contact surface fraction. Qef is the flux with error of form. Q is the flux without error of form for the same contact surface fraction.




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