Experimental Examination of the Streamwise Velocity in a Plane Mixing Layer usinga Single Hot-Wire Sensor

摘要

A single-sensor hot-wire probe was used to make streamwise measurements in aturbulent plane mixing layer. The mixing layer, with a velocity ratio of approximately 2:1, was created in an open return wind tunnel by the insertion of a curved splitter plate. Conditions were studied with the splitter plate boundary layers tripped. The single-sensor results demonstrate that this mixing layer has standard velocity field statistical properties. The data were taken at several Reynolds numbers in the fully turbulent flow downstream of the mixing point. The results from the tripped initial boundary layers/ fully turbulent conditions were compared with the temporally developing mixing layer direct numerical simulation results of Rogers and Moser (1994).