Analytical and Experimental Studies of Liquid and Gas Leaks through Micro and Nano-Porous Gaskets

Abstract

<p align="justify"> <span style="font-family:Verdana;">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</span><span style="font-family:Verdana;">dition on the leak path wall to determine the porosity parameters of the gasket. The analytical model results are vali</span><span style="font-family:Verdana;">dated and confronted against experimental data which were conducted under various conditions of fluid media, pressure, gasket stress and temperature. Two experimental test rig</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> 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</span><span style="font-family:Verdana;">phisticated detection system based on the pressure rise method</span><span style="font-family:Verdana;">.</span><span></span> </p> <p> <span></span> </p

Study on Leakage Model of Typical Penetration of Closed Structures Based on Porous Media Seepage Theory

“…In the second analysis step, the bolt force is brought to the pretension. In the third analysis step, the pressure under various working conditions is applied to the flange and the inner wall of the cover [15,16].…”

Liquid leakage assessment from gas leakage tests

“…Emphasis of the work by Murvaya and Silea [5] is on the state-of-the-art in leak detection and localization methods, based on the principle that gas leakage detection can avoid the major incidents resulting from gas leakages. However, no emphasis is given to the relationship between the liquid and gas leakage flow rates through the same leak geometry Work by Grine and Bouzid [6] develops an analytical leak rate prediction methodology applying for the particular case of gasketed joints, including the estimation of the leak porous structure through a pseudo analytical-experimental approach. The analytical model is validated by comparison with experimental results.…”