Free-flight measurements of turbulent-boundary-layer skin friction in the presence of severe aerodynamic heating at Mach numbers from 2.8 to 7.0

Free-flight measurements of turbulent-boundary-layer skin friction in the presence of severe aerodynamic heating at Mach numbers from 2 8 to 7 0 . S. C. Sommer and B. J. Short. N.A.C.A., T.N. 3391 (March 1955). Measurements of average skin friction of the turbulent boundary layer have been made in free flight at high rates of heat transfer at high Mach numbers. The results are appreciably higher than zero-heat-transfer wind-tunnel data. The V method for laminar boundary layers, slightly modified, is shown to agree with results of this and other investigations at widely different Mach numbers and heattransfer conditions.—(1.1.3.4).