论文部分内容阅读
尾吊式发动机短舱在全机影响下的气动设计非常复杂,与机翼、机身、平尾等部件的气动干扰对全机的气动特性有较大影响。为了评估不同发动机空气流量对机翼高速升阻特性的影响,本文在计算流体动力学软件Fluent中对飞机的全机流场进行了数值模拟,着重考察了不同发动机进口流量对机翼表面流场的影响情况。计算结果表明,对于尾吊式发动机短舱而言,发动机空气流量增加将导致机翼的升、阻力系数增加,但升阻比会有所下降。
The aerodynamic design of the tail-hang nacelles under the influence of the whole machine is very complicated. The aerodynamic interference with the wings, the fuselage and the tail of the tail has a great impact on the aerodynamic characteristics of the whole machine. In order to evaluate the influence of different engine air flow on the high speed lift characteristics of the wing, numerical simulation of the whole flow field of the aircraft is carried out in CFD software FLUENT. The effects of different engine inlet flow rates on the wing surface flow field The impact of the situation. The calculation results show that, for the nacelle, the increase of the engine air flow will lead to the rise and drag coefficient of the wing increasing, but the drag-and-drag ratio will decrease.