摘要
采用有限体积法用三维Ｎ－Ｓ方程对旋翼近地飞行时的速度场进行了数值计算，对旋翼桨盘处的诱导速度进行了分析。旋翼对流场的作用由分布在特定区域内的动量源项模拟，动量源项的强度由旋翼的几何尺寸，叶片剖面的空气动力特性及当地流场的性质迭代定出。本文讨论了旋翼近地飞行时，在不同前进比及不同离地高度情况下的诱导速度随径向距离及方位角的变化，并将数值计算结果与实验结果进行了比较。
A finitevolume method is used to solve the 3D NavierStokes equations to calculate the induced velocity of a rotor in forward flight near the ground.The rotor is modeled as a distribution of momentum sources,the strengths of which are determined from an iterative manner of calculating the local flow field properties,the rotor geometry and the aerodynamic characteristics of the blade crosssection.The distribution of induced velocity are investigated for several advance ratios and flight heights.
出处
《空气动力学学报》
CSCD
北大核心
1998年第2期221-225,共5页
Acta Aerodynamica Sinica
关键词
旋翼诱导速度
地面效应
N-S方程
数值解
rotor induced velocity
ground effects
NavierStokes equations numerical calculations
