【作者】 耿建中； 段卓毅；

【Author】 GENG Jian-zhong;DUAN Zhuo-yi;AVIC The First Aircraft Institute;

【机构】 中航工业第一飞机设计研究院总体气动所；

【摘要】 研究了翼-尾近距耦合涡桨飞机纵向呈现的强烈非线性气动特性,分析了涡桨动力和螺旋桨滑流对非线性气动特性影响机理。分析了影响飞机起飞时的安全因素,以及起飞过程中,进入非线性气动区域的条件,理论研究了非线性气动特性对飞机起飞操纵的影响,给出了改善措施建议。建立了飞机动力学仿真数学模型,通过仿真研究了大气环境和驾驶员对飞机起飞安全性的影响,给出了翼-尾近距耦合涡桨飞机起飞所能抗御的突风速度和驾驶员误操纵量。研究表明通过适当的飞行边界保护可以提高翼-尾近距耦合涡桨飞机起飞安全性。更多还原

【Abstract】 Turbo-propeller aircraft with close-coupled wing and tail showing strong longitudinal nonlinear aerodynamic characteristics was researched, and the influence mechanism of turboprop power and propeller slipstream on nonlinear aerodynamics was analyzed. Take-off safety factors, as well as the entry condition of nonlinear aerodynamic zone, were discussed. Theoretical analysis of impacts of nonlinear aerodynamics on takeoff maneuver was carried, and improvements were put forward. Dynamic modeling was set up, and the influence of atmospheric environment and the pilot control on the take-off safety was researched by means of computation and simulation. The maximum gust velocity and inaccuracy control extent of turbo-propeller aircraft with close-coupled wing and tail were given. The result indicates that the appropriate boundary protection could obviously improve the takeoff safety of turbo-propeller aircraft with close-coupled wing and tail.更多还原