Analytical and Experimental Studies of Liquid and Gas Leaks through Micro and Nano-Porous Gaskets
- 1 Mechanical Engineering Department, Ecole de Technologie Superieure, Montreal, Canada
- 2 Mechanical Engineering Department, Ecole de Technologie Superieure, Montreal, Canada
Abstract
The reliability of industrial installation requires minimum leakage of pressurized sealed joints during operation. At the design stage, the leakage behavior of the gasket must be one of the most important parameter in the gasket selection. The objective of the work presented in this paper is to develop an analytical leak rate prediction methodology used in gasketed joints. A pseudo analytical-experimental innovative approach was used to estimate the characteristics of the porous structure for the purpose of predicting accurate leak rate through gaskets with different fluids under conditions similar to those of operation. The analytical model assumes the flow to be continuum but employs a slip boundary con dition on the leak path wall to determine the porosity parameters of the gasket. The analytical model results are vali dated and confronted against experimental data which were conducted under various conditions of fluid media, pressure, gasket stress and temperature. Two experimental test rig s fully automate that accurately reproduces the real leakage behavior of the gasketed joint have been developed to analyze the mechanical and thermal effects on the gasket flow regime. The gas leaks were measured with multi-gas mass spectrometers while liquid leaks were measure using a so phisticated detection system based on the pressure rise method .
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