Analysis and Experimental Verification of the Sealing Performance of PEM Fuel Cell Based on Fractal Theory

Aiming to accurately predict the leakage rate of sealing interface, this work proposes a two-dimensional finite element model proton exchange membrane fuel cell, which includes microscopic surface morphology and asperity contact process components. First all, we constructed seal by W-M (Weierstrass–Mandelbrot) fractal function explored influence dimension (D) scale parameter (G) on profile. Furthermore, method Poiseuille fluid theory were adopted obtain deformation variables under different clamping pressures rates. Moreover, quantitatively analyzed impact roughness pressure rate. It was found that both amplitude are positively correlated with G negatively D. Surface is proportional D but has no relationship G. Additionally, decreases exponentially growing pressure, consistent experimental values at 0.54 MPa. With same rate, when value less than 1 μm, doubled leads an increase 31% in pressure. In contrast, greater induces 50% corresponding