Parametric Relations for Ordinary and Confluent Turbulent Boundary-Layer Flows

Abstract

Theme T paper presents the results of an investigation of parameters associated with the confluent boundary layer shown schematically in Fig. 1. It is shown that with a suitable choice of parameters, velocity profiles in both jet and wake layers become similar, with the same similarity function obtained for different pressure gradients. Moreover, local dynamic similarity allows suitable functional representation of shear stress at the loci of maximum and minimum velocity. Measured eddy viscosity distributions for the confluent boundary layer is presented for one velocity ratio at slot exit. An analytical solution for the conventional flat plate turbulent boundary layer is shown for comparison purposes.