进排气效应对飞翼布局无人机气动特性的影响  

Effect of engine air intake and exhaust on the aerodynamic performance of the UAV

作　　者：郁新华[1] 陶于金[1] 师小娟[1] 

机构地区：[1]西北工业大学无人机研究所,陕西西安710072

出　　处：《飞行力学》2011年第5期18-21,共4页Flight Dynamics

摘　　要：利用雷诺平均可压缩N-S方程和可实现K-ε模型,对飞翼布局无人机进行了内外流场的气动耦合计算,研究分析了进排气系统对飞翼动布局气动特性的影响。数值模拟结果表明,进排气效应明显影响了前后机身一定范围内的压力分布,使得全机升力、阻力和俯仰力矩增加,纵向静安定度有所减小;另外,低速比高速时的影响尤为明显,低速时进排气效应使得最大升阻比降低4左右,而高速时最大升阻比降低2左右。Based on the Reynolds averaged compressible Navier-Stocks equation and realizable k-ε turbulence model,the couple numerical simulation of the external and engine inlet flows is carried out to study the effect of engine air intake and exhaust on the aerodynamic performance of the wing configuration UAV.The simulation results show that the air intake and exhaust can affect the pressure distribution on some flow fields of the forebody and afterbody,and increase the values of lift and drag,and pitching moment,but decrease the longitudinal static stability of the UAV;simultaneously there is about 4 decrease of the maximum lift-drag ratio affected by the engine air intake and exhaust in slow speed,but about 2 decrease of the maximum lift-drag ratio in high speed.

关 键 词：进排气 气动特性 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]