抄録
The interfaces between turbulent and non turbulent regions in two-dimensional turbulent jet are investigated using conditional-sampling and ensemble-averaging techniques. The measurement is done by using the combined probe for the simultaneous measurement of instantaneous static pressure and two velocity components to investigate the flow structure and the vortex structure at the interfaces. Experimental results show that the thickness of the interface is about 0.08 times the half-width of the cross streamwise profile of the mean streamwise velocity and comparable to the Taylor microscale. There is a sharp pressure drop in middle of the interface and suggests the existence of vorticity.
