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ARJ21飞机是我国自行研制的具有典型T尾布局特点的先进支线飞机。失速和失速特性试飞是ARJ21飞机适航取证试飞最重要的试飞项目之一。高平尾(T尾)布局飞机可能存在深失速运动模态,给飞机的失速特性试飞带来安全风险。本文首先分析了高平尾(T尾)布局飞机的空气动力学特点,剖析了“深失速”现象的产生原因,并在此基础上以ARJ21飞机为算例,结合具体的风洞实验数据库,应用工程估算的方法对动导数进行了补充完善,其次建立了适合预测飞机失速和深失速运动方程的空气动力学模型,并对飞机的运动特性特别是深失速特性进行了仿真计算,计算结果与实际试飞结果取得了较好的一致性;最后选择深失速状态作为失速改出伞设计的临界状态,建立失速改出伞的数学模型,对失速改出伞改出深失速的动态过程进行了仿真计算,验证了失速改出伞改出深失速的设计参数,为失速改出伞的研制提供了参考依据。
The ARJ21 aircraft is an advanced regional aircraft developed by our country with typical T-tail layout. Stall and Stall Tests are one of the most important test flights for the ARJ21 airworthiness certification flight test. Layout of Tail (T-tail) The aircraft may have a deep stall motion mode, posing a safety risk to the flight test of the aircraft. This paper first analyzes the aerodynamic characteristics of aircraft with T-tail layout and analyzes the causes of the “deep stall” phenomenon. Based on this, taking the ARJ21 aircraft as an example and the wind tunnel experimental database , The dynamic derivatives were supplemented by applying the engineering estimation method. Secondly, an aerodynamic model suitable for predicting the equations of motion of the aircraft stalling and deep stalls was established. The aerodynamic characteristics of the aircraft, especially the deep stall characteristics, were simulated and the results were obtained And the actual test results achieved good consistency; Finally, the state of stalling stalls as the critical state of umbrella design, the establishment of a mathematical model of stalling out of umbrella, stalling out of the umbrella out of the deep stall dynamic process was carried out The simulation calculation verifies that the design parameters of stalling out of the umbrella out of the deep stall, the reference for the development of stalling umbrella provided.