COMPUTATION OF SEPARATED DUCT FLOWS USING THE BOUNDARY-LAYER EQUATIONS

A semi-inverse method, based on boundary-layer equations, for simulati on of duct flows with strong viscous/inviscid interaction is developed . An improved interaction formula, based on the matching of parameters in viscous and inviscid zones, is proposed. Using this method the lam inar and turbulent flows in plane channels, swirl flow in annular chan nels, and a bypass flow with downstream mixing of the trailing edge of a splitter were calculated. The results for the plane channel and byp ass flows are in good agreement with known experimental and theoretica l data. The influence of swirl and parameters of the bypass flow on th e separation zone structure were investigated. A new type of self-simi lar solution for swirl boundary-layer equations was obtained.