Numerical Investigation on the Mechanism of Transpiration Cooling for Porous Struts Based on Local Thermal Non-Equilibrium Model

Struts as an important structure in the combustion chamber of hypersonic flight vehicles to inject fuel into main flow face a severe thermal environment. Transpiration cooling is considered potential method provide protection for struts. This paper presents numerical investigation on transpiration strut based Darcy–Forchheimer model and local non-equilibrium analyzes mechanism cooling. A coolant film velocity boundary layer are formed surface shock wave pushed away from strut, which can effectively reduce heat load exerted strut. The temperature difference between solid matrix inside porous analyzed, phenomenon found that fluid higher than at leading edge As flowing medium, absorbs matrix, stagnation point influence mass rate various coolants studied. increases, efficiency becomes medium smaller. with lower density specific will form thicker more brings better effect