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高速巡航飞行时,机头的流动特性对大型民机的耗油率以及驾驶舱的舒适程度都有影响,民机高速巡航飞行时要求飞机头部尽可能不存在分离流动,高速气流在机头舷窗位置不出现激波。通过风洞试验,在FD-12高速风洞中得到了某民机头部的压力分布、彩色油流照片以及PIV空间流场显示结果。试验结果表明:在巡航状态下,机头表面主要是附着流动,来流马赫数为0.82时,机头舷窗后方局部出现超声速区。
High-speed cruising flight, the nose of the flow characteristics of large-scale civil aircraft fuel efficiency and the comfort of the cockpit have an impact, civil aircraft high-speed cruise flight requires separation of the head as far as possible without separation, high-speed airflow in the nose No shockwave at the porthole location. Through the wind tunnel test, the pressure distribution of the head of a civil aircraft, the pictures of colored oil flow and the flow field in PIV space were obtained in the FD-12 wind tunnel. The experimental results show that the cruise surface, the nose surface is mainly attached to the flow, the Mach Mach number is 0.82, the porthole rear ultrasonic nose appeared locally.