An experimental investigation of skin friction in the presence of mass injection on a porous flat plate, in supersonic, turbulent flow, has been carried out. Useful data have been obtained at Mach number 3.2 (nominal) and at two numbers of the order of 10. Measurements were made with a skin-friction balance which permitted mass injection through its friction surface. The injectant gas was nitrogen. The results of the experiments are in essential agreement with the theory of Rubesin as regards skin-friction reduction with mass injection. In addition, correlation of the skin-friction data with heat-transfer measurements, conducted previously by Bartle and Leadon, tend to verify the Reynolds analogy between skin friction and heat transfer developed by Rubesin.
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DERSHIN et al. (1967) studied this question.
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