鸭式布局飞机矢量喷流对地面效应影响的风洞试验

针对单发鸭式布局飞机，通过低速风洞试验，研究了矢量喷流对飞机地面效应的影响特性。研究结果表明：发动机喷流使得飞机的地面效应增强，升力系数增加，降低飞机起飞/降落时的飞行速度，缩短起降距离，从而改善飞机起降性能。发动机喷管上/下偏转时，矢量喷流对飞机上下表面气流诱导不对称，均使地面效应阻力系数增量减小。在此基础上，基于数值模拟结果对喷流与地面效应的相互作用机理进行了分析。

Wind tunnel test of canard aircraft interactive behaviors between vectoring jet and ground effect

An experimental study of single-engine canard aircraft interactive behaviors between vectoring jet and ground effect is conducted in the low-speed wind tunnel. The results indicate that jets can enhance the ground effect of the aircraft, increase the lift coefficient, reduce flight velocity of take-off/landing, and shorten the distance of take-off/landing, improving the performance of take-off/landing. When the nozzle of vectoring engine is deflected upward or downward, the airflows induced by vectoring jets in the upper and lower surface of the aircraft are asymmetrical, reducing the increments of drag coefficient caused by ground effect. On this basis, the flow field mechanism of interactive behaviors between vectoring jet and ground effect is analyzed by numerical simulation.