Experimental study of flow reattachment in a single-sided sudden expansion

摘要: The reattachment of a fully turbulent, two dimensional, separated shear layer downstream single-sided sudden expansion in planar duct flow was examined experimentally. importance changing the structure on process itself examined. For all cases, Reynolds number based step height greater than 20,000, ratio 5/3, and inlet boundary less one-half thickness. A crucially important phase development pulsed wall probe for measurement skin friction region, thus providing an unambiguous definition length. Quantitative features - including streamwise mean fluctuating velocity field, pressure rise, were found to be similar cases studied when scaled by zone is proposed.