Experimental investigation on the momentumless wake

Trailing edge blowing wake management technology was adopted to improve the flow of stator wake.The flow parameters of stator wake were measured by hot wire anemometers(HWA) under different mass injection.Axial velocity profile,spectrum of velocity fluctuating and development rule of the wake width were obtained for pure wake,weak wake,momentumless wake and jet.According to the experimental results,injection up to momentumless wake can eliminate the vortex shedding frequency of the stator,and make the outlet velocity profile of the stator smooth.Meanwhile,the wake characteristic length scale of momentumless wake is in direct proportion to x0.35,while pure wake is in direct proportion to x0.37.