An analytical estimation of the effect of transpiration cooling on the heat-transfer and skin-friction characteristics of a compressible, turbulent boundary layer

Morris W. Rubesin
naca-tn-3341
Dec 1954


An analysis based on mixing-length theory is presented which indicates that surface blowing associated with transpiration cooling systems produces large reduction in both the heat-transfer and skin-friction coefficients for a turbulent boundary layer on a flat plate. The numerical results are restricted to the case of air blowing into air. The effects of blowing are indicated to be similar for high-speed, compressible flow to those for low-speed, incompressible flow.

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