运输机尾部布局气动特性研究

摘要

To obtain adequate tail down angle during the take-off and landing of transport aircrafts and facilitate cargo handling,upswept afterbodies are usually adopted by transport aircrafts which actually lead to poor aerodynamic efficiency.esides,mproving static stability is also an important aspect of the configuration design.onsidering the principle of structure design,tatic stability and aerodynamic characteristics,hree different programs aiming at modifying the configuration of the rear of the transport aircraft are proposed.hen lift-drag force characteristic and static stability of different programs are calculated after the modeling of the rear of the transport aircraft.inally the effective methods which can improve lift-drag force characteristic and static stability are available.%在运输机布局设计研究中,为了满足起飞和着陆时的擦地角以及方便装卸货物,往往机身后体会进行上翘,从而损失了部分气动效率,同时,改善静稳定性也是设计中需要考虑的重要因素.为更好地兼顾结构设计原则、静稳定性能和气动性能,通过对某运输机尾部进行修型设计,提出了三种不同的修型方案.通过建模计算,分析了不同修型方案升阻特性及静稳定性的变化,从而得出提高升阻特性、增加静稳定性的有效方法.