The Research on Aerodynamic Characteristics of High-Lift Configuration of Transport Plane with the Effect of Engine Jet

By the method of CFD( Computational Fluid Dynamic),the aerodynamic characteristics of high-lift configuration with the effect of engine jet is researched. The result of numerical simulation demonstrates that with the effect of engine jet,the maximum lift coefficient increases,and the stall angle increases,longitudinal stability factor decreases significantly. Conclusion can be obtained by analyzing the physics characteristics of flow that the engine jet not only changes local flow field of flap after the engine,but also changes the local flow field on the upper surface of nacelle and main wing. In view of the above analysis,during the process of designing high-lift configuration of wing hanging engine,the effects of engine jet on the local flow field of each part has to be considered.