Experiment Investigation of Side Wall Boundary-Layer Blowing Control System of A Multi-element Airfoil Model in Wind Tunnel

摘要

The blowing control system of sidewall boundary layer in the NF-3 wind tunnel two dimensional sections and testing method were introduced in this paper. The control effect of wind tunnel side wall boundarylayer with different blowing coefficient and the effect of experiment result on aerodynamic characteristics of the high-lift airfoil were given. The results of initial experiment show that the system can effectively control the wind tunnel side wall boundary-layer, improve the lift coefficient We can conclude from this experiment that this control methodologycan effectively reduce the interference of side wall boundary-layer and improve the flow behavior of wind tunnel and the two dimension flowing characteristic over the airfoiL At last, the NF-3 wind tunnel experiment result and literature were compared for the sake of further verifying the effective of the NF-3 wind tunnel side wall boundarylayer blowing control system. It shows that this control system can effectively reduce the interference of wind tunnel side wall layer.