有限翼展机翼绕流PPT.ppt
有限翼展机翼绕流,2023/2/25,1,FluidMech.23 Finite Wings,2023/2/25,2,FluidMech.23 Finite Wings,2023/2/25,3,FluidMech.23 Finite Wings,2023/2/25,4,FluidMech.23 Finite Wings,2023/2/25,5,FluidMech.23 Finite Wings,2023/2/25,6,FluidMech.23 Finite Wings,2023/2/25,7,FluidMech.23 Finite Wings,2023/2/25,8,FluidMech.23 Finite Wings,2023/2/25,9,FluidMech.23 Finite Wings,2023/2/25,10,FluidMech.23 Finite Wings,2023/2/25,11,FluidMech.23 Finite Wings,2023/2/25,12,FluidMech.23 Finite Wings,2023/2/25,13,FluidMech.23 Finite Wings,2023/2/25,14,FluidMech.23 Finite Wings,2023/2/25,15,FluidMech.23 Finite Wings,2023/2/25,16,FluidMech.23 Finite Wings,下洗(downwash)运动诱导阻力(induced drag),2023/2/25,FluidMech.23 Finite Wings,17,2023/2/25,18,FluidMech.23 Finite Wings,某超临界翼型机翼所受阻力Cw,Cw=Cd+Cf+Ci+Cs Cd:压强阻力(10%)Cf:摩擦阻力(51%)Cd:诱导阻力(35%)Cs:激波阻力(4%)(数据来自普朗特流体力学基础,p237),2023/2/25,FluidMech.23 Finite Wings,19,举力线理论模型,2023/2/25,20,FluidMech.23 Finite Wings,2023/2/25,FluidMech.23 Finite Wings,21,2023/2/25,22,FluidMech.23 Finite Wings,Prandtl举力线经典理论环量基本积分-微分方程,2023/2/25,23,FluidMech.23 Finite Wings,大展弦比机翼Prandtl的3点简化,自由涡面是平行于来流的半无限平面;平面界面假设(局部平面流动假设);举力线模型.,2023/2/25,24,FluidMech.23 Finite Wings,2023/2/25,25,FluidMech.23 Finite Wings,2023/2/25,26,FluidMech.23 Finite Wings,2023/2/25,27,FluidMech.23 Finite Wings,2023/2/25,FluidMech.23 Finite Wings,28,2023/2/25,FluidMech.23 Finite Wings,29,2023/2/25,FluidMech.23 Finite Wings,30,2023/2/25,FluidMech.23 Finite Wings,31,2023/2/25,32,FluidMech.23 Finite Wings,2023/2/25,FluidMech.23 Finite Wings,33,2023/2/25,34,FluidMech.23 Finite Wings,
