Research on permeability and flow resistance characteristic of sintered porous structure

To study the permeability and flow resistance of sintered porous stainless steel,a test was conducted for compressed air and gaseous hydrogen as the medium.The experimental results indicate that,there is a linear relationship between the pressure loss through the porous structure and the medium flow rate,when the flow Reynolds number in the pores is less than 1;or there is a non-linear characteristics when Reynolds number is larger than 1.This shows that:the flow friction of gaseous hydrogen or air within the pores is underestimated using the traditional correlations based on the experiments of packed beds;but the permeability of the sintered porous structure is overestimated by the Ergun's corrective correlation.The relationship between the friction resistance and permeability of hydrogen or air flowing through the porous structure was simulated with the aid of the experimental data.