大型民用运输机诱导气动性能优化研究

摘要

对于大型民用运输机,机翼上、下表面的压力差产生了升力,同时在翼尖部位形成的翼尖涡又导致了诱导阻力的产生.为了减小飞机的诱导阻力但不损失升力,目前大多数飞机采用了在翼尖部位加竖直段减小诱导阻力,然而在翼尖部位加装竖直段后所带来的流动干扰导致了局部激波和负升力产生了.针对上述问题,提出了一种新型的非共面机翼在常规机翼上稍加装竖直段再加横侧段.仿真结果表明,改进方法较好地克服了上述不利干扰,优化了飞机的诱导气动性能.%For the large civil transport aircraft,due to the pressure difference between the up and low wing surfaces,lift is produced but at the same time induced drag produced by the wingtip vortex at wingtips.Conventionally,in order to reduce induced drag and avoid the loss of lift,vertical section is used,being attached to wingtips,while a local shockwave and negative lift come in to being.Base on this,the paper presents a new measure that horizontal section is added to the vertical section.Simulation result shows that this method overcomes the above disadvantages and optimize the induced aerodynamic performance.