TURBULENT BOUNDARY LAYERS WITH ARBITRARY PRESSURE GRADIENTS AND DIVERGENT OR CONVERGENT CROSS FLOWS.

A turbulent viscosity hypothesis which has been previously verified for equilibrium boundary layers is now applied to incompressible boundary layers with arbitrary mainstream pressure variations. The empirical content of the turbulent viscosity hypothesis which involves three adjustable constants, one of which is the von Karman constant is solely derived from constant pressure profile data. The present work is an exlension of the previous work in that the mean differential equations of motion are integrated numerically. This time, however, one must deal with partial differential equations instead of the similar, ordinary differential equations applicable to equilibrium flows. An important result is that prediction of the skin friction coefficient and separation is very good. Consideration of divergent or convergent cross flows secondary flows is included in the paper. Author