In order to investigate the influence of micropores collocation with different shapes on sealing performance,a discrete model of seal clearance fluid was developed by finite volume method based on the Reynolds equation and JFO cavitation boundary condition.27 models were obtained by randomly collocating the micropores of three shapes,i.e.,circle,ellipse and isosceles triangle micropores,and the opening forces and leakage rates of each model under different pressure difference and rotating speed were calculated.The sealing performance parameters distribution diagrams were mapped by the normalized opening force and leakage rate data.The results show that the leakage rate is lower and opening force is higher when the number of circular micropore is smaller and the circular micropores are closer to the outer diameter in the model.The sealing performance parameters appears regionalized and centralized distribution when the pressure difference is 0.This phenomenon is influenced by hydrodynamic effect and hydrostatic pressure,and it is easier to appear under lower pressure difference and higher rotating speed.