Study on control of radial attaching jet flow. (5th report Comparison of the results between velocity, pressure and flow visualization)

Abstract

An experimental study is presented on the control of the reattachment of a radial turbulent jet flow (main jet flow) discharged from a cylindrical nozzle onto an adjacent offset disc plate, with the addition of another control flow (suction and blowing). The effects of various step heights and control flow rates on the flow properties were investigated by the velocity and pressure distributions, and by flow visualization. A flow field was divided into four regions: the initial region, the recirculation region, the transitional region and the wall jet flow region. Deflections of jet potential core and jet center axis, changes of jet center velocity and jet half width, and static pressure distributions at the wall surface in each region were examined.