- A drag associated with losses of total pressure and total temperature in the boundary layers. It is the sum of the boundary-layer normal-pressure drag and the surface friction.
Aviation dictionary. 2014.
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boundary-layer normal-pressure drag — A drag resulting from the shape of the body. Streamlining the exposed parts can reduce boundary layer drag. See also form drag … Aviation dictionary
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boundary layer — The layer of fluid, close to the surface of a body placed in a moving stream, in which the impact pressure is reduced as a result of the viscosity of the fluid. A velocity gradient exists through the boundary layer, ranging from the velocity of… … Aviation dictionary
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Drag (physics) — Shape and flow Form drag Skin friction 0% 100% 10% 90% … Wikipedia