The turbulent boundary layer on a rough curvilinear surface


naca-tm-1440
1958


A method has been derived for the calculation of the turbulent boundary-layer skin-friction drag on a flat plate of a curvilinear surface with a pressure gradient with or without distributed roughness. The method has been checked by comparing the calculated with the measured drag of an airfoil smooth and with each of two grades of carborundum on the surface. The calculated drags compared very well with the measured drags.

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