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采用螺旋桨飞机动力模拟风洞试验技术及粒子图像测速技术,研究双发常规布局涡桨飞机的螺旋桨滑流对飞机纵向气动特性的影响规律。通过测力风洞试验研究螺旋桨不同位置处滑流对飞机的升阻特性、力矩特性及平尾下洗等纵向气动特性的影响,利用PIV技术研究测力试验优选桨盘位置的飞机部件典型剖面受滑流影响时的流场变化情况。研究结果表明,螺旋桨下沉后滑流对飞机升阻特性的不利影响最明显,螺旋桨前伸和安装角由正变负时滑流对飞机的升阻特性均有改善,而螺旋桨前伸在飞机失速迎角附近对升力特性的改善更为明显。
The propeller aircraft dynamic simulation wind tunnel test and particle image velocimetry technology are used to study the influence of propeller slipstream on the longitudinal aerodynamic characteristics of a twin-liner conventional turboprop aircraft. Through the force-wind tunnel test, the influence of slip flow on the lift resistance, torque characteristics and vertical aerodynamic characteristics of the aircraft at different positions of the propeller is studied. The PIV technology is used to study the typical section of aircraft components with optimal paddle position Flow field changes when slipstream is affected. The results show that slipstream after propeller has the most significant adverse effect on the lift resistance and dragging performance of the aircraft. The propeller forwards and mounting angles improve from positive to negative slipstream to the lift resistance characteristics of the aircraft, The improvement of lift characteristics is more pronounced near the angle of attack.