Prediction of sealing interface leakage based on porous medium model considering effective porosity

Abstract

To explore the influence of surface topography on sealing performance and improve the prediction accuracy of leakage, a porous medium leakage model considering effective porosity is proposed. Based on the measured point cloud data from two rough surfaces, a three-dimensional percolation grid model is developed to simulate the sealing interface. By using the connected domain labelling algorithm, the effective porosity of the sealing interface is obtained. An experiment is implemented to measure the leak rate of sealing interface. It is shown that the proposed leakage model predicts the leak rate of a sealing interface consisting of two rough surfaces accurately, which is convenient for engineering applications.