Study on Control of Radial Attaching Jet Flow : 2nd Report, Effects of Control Flow on Pressure Distributions

Abstract

This paper presents the results of an experimental study on the reattachment of a radial turbulent jet flow discharged from a cylindrical nozzle on an adjacent offset disc plate, in the presence of a control flow. Static pressure distributions along the wall surface and across the jet flow were measured with a disc type pressure hole, and the effects of step height and control flow rate (suction and blowing) on them were investigated. Length and mean negative pressure in the recirculation region, and position of the attachment to the wall surface were examined. An oil film flow visualizing technique was also applied to determination of the flow pattern. The results were compared with those obtained from the pressure distributions.