ISSN Online: 2377-424X
ISBN Print: 978-1-56700-421-2
International Heat Transfer Conference 15
Experimental and Numerical Investigations of Supersonic Transpiration Cooling Through Sintered Porous Flat Plates
Sinopsis
The flow and heat transfer characteristics of supersonic transpiration cooling through sintered porous flat plates was investigated experimentally and numerically with dry air as the coolant in a Mach 2.81 wind tunnel. The wall temperatures were measured with an infrared camera with a Schlieren system used to observe the shock wave structures. The experiments analyzed the effects of injection rate and solid matrix thermal conductivity on the cooling efficiency. The Schlieren images show an oblique shock wave induced by the “blockage” effect of the coolant blowing with the shock intensity increasing with increasing coolant blowing ratio. The measured surface temperature distributions show that a small amount of coolant injection strongly reduces the surface temperatures. A higher thermal conductivity of the porous matrix improves the cooling effect and the surface temperature uniformity.