涵道螺旋桨桨叶涡强度分布计算

本文依据开式螺旋桨理论 ,涵道后缘的库塔条件以及微元涡丝的诱导方程 ,建立了涵道螺旋桨叶片涡强度分布的计算模型并进行了数值计算。结果显示 ,涵道螺旋桨桨叶涡强度在桨尖处达到最大

A Numerical Model for Duct Fan Vortex Intensity

Duct fans play an important role in WIG propulsion system.The vortex system of duct fan can be divided into two parts,inner sheet and boundary sheet,which are induced by each other.It is assumed that the boundary sheet should eliminate the radial velocity disturbance of inner sheet,match the discontinuity between the intersections of boundary sheet,not induce the inner sheet,and ensure the constraint that the sum of vortices equals zero.Based on the classical theory of propeller,Kutta conditions,vortices induced equations,and assumptions of duct fan,a numerical model for calculating duct vortex intensity of fan blades is set up in this paper.Results show that the vortex intensity reaches its maximum value at the blade tip for the duct fan.This intensity profile is much different from that of the general propeller.