国防科技大学学报2016，Vol.38Issue(4)：28-33,6.DOI:10.11887/j.cn.201604005
涵道风扇外形参数对气动特性的影响
Influence of ducted fan profile parameters on aerodynamic characteristics
摘要
Abstract
The influence of ducted fan profile parameters to aerodynamic characteristics was investigated. The three-dimensional incompressible viscous Navier-Stokes equations and SST k -ωturbulence model were used to simulate the complex flow of a 2 -blade propeller, which was based on the sliding mesh method.To demonstrate the feasibility of the method,the result was compared with the experimental data.The influences of the lip shape,diffuser angle,the height of duct on aerodynamic characteristics and the flow field were analyzed under the condition of hovering and within the limits of 3000 r/min to 8500 r/min.The thrust coefficient was produced by the ducted fan under the condition that the elliptical lip is smaller than the others,and its aerodynamic efficiency is very low.The power coefficient is the smallest when the diffuser angle is 8.2°.The flow separation emerges nearer to the duct under the propeller disk,with the increase of diffuser angle.The sensitivity of thrust coefficient to the change of ducted fan height is low.The power coefficient descends slightly with the increase of height.关键词
涵道风扇/外形参数/气动特性/唇口外形/扩张角/涵道高度Key words
ducted fan/profile parameter/aerodynamic characteristics/lip shape/diffuser angle/height of duct分类
航空航天引用本文复制引用
李晓华,郭正,柳兆伟,陈清阳..涵道风扇外形参数对气动特性的影响[J].国防科技大学学报,2016,38(4):28-33,6.基金项目
航空科学基金资助项目 （）
