V形尾翼无人机喷流对气动力特性干扰的数值模拟  

Numerically Simulating Aerodynamic Characteristics of UAV with Vee-Tail with High-Speed High-Temperature Jet Flow Interference Considered

作　　者：马建[1] 杨青真[1] 李岳锋[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《西北工业大学学报》2010年第1期107-112,共6页Journal of Northwestern Polytechnical University

摘　　要：全球鹰外形的无人机,其V形尾翼位于发动机喷管两侧,发动机的高温、高速喷流对尾翼和飞机的气动干扰影响很大。文章通过数值模拟分析了V形尾翼与发动机喷流的相互干扰作用,给出了全球鹰外形无人机在不同高度、马赫数以及相应的发动机工作状态下的气动力特性,定量对比不带发动机喷流和带有喷流的计算结果,得出了发动机喷流对尾翼及全机的气动影响,可作为无人机V型尾翼和发动机气动布局设计的参考。Sections 1,2 and 3 of the full paper give a briefing respectively of the calculation model of an unmanned aerial vehicle （UAV）, the generation of calculation grid and the governing equations and boundary conditions. Subsection 4.1 is entitled the jet flow interactive interference of nozzle-afterbody-Vee-tail; it presents the calculation results in Fig. 2 and discusses them. Subsection 4.2 is entitled the effect of jet flow on longitudinal aerodynamic characteristics; it presents the calculation results in Figs. 3, 4 and 5 and discusses them; it is particularly worth pointing out that, when the angle of attack is above 0 degrees, the lift coefficient increases 3% to 4% in the case of sideslip. Subsection 4.3 is entitled the effect of jet flow on lateral and yawing aerodynamic characteristics; it presents the calculation results in Figs. 6, 7 and 8 and discusses them; it is particularly worth pointing out that, with jet flow, the yawing moment coefficient increases more quickly with increasing angle of slip.

关 键 词：气动特性 V形尾翼 全机内外流模拟 喷流干扰 无人机 

分 类 号：V221[航空宇航科学与技术—飞行器设计]