Combined Free Wake /CFD Methodology for Predicting Transonic Rotor Flow in Hover  

预测悬停旋翼跨音速流动的一种组合自由尾流/CFD方法(英文)

作　　者：曹义华 余志强 苏媛 康凯 

出　　处：《Chinese Journal of Aeronautics》2002年第2期65-71,共7页中国航空学报（英文版）

基　　金：Aeronautical Science Foundation of China(0 0 A5 10 5 0 )

摘　　要：A new combined wake /CFD methodology is used to include realistic wake effects in CFD solutions for the rotor flow in hover. The analytical method for predicting the hovering rotor wake is described to investigate the motion of the helical tip vortex. Beginning with the generalized wake model, a Semi Empirical Correction for the vortex core effect on the rotor wake is made. Then on the condition of circulation and wake geometry convergence, the free wake calculation is carried out. Finally, Euler equations are solved for transonic rotor flow employing Jameson’s finite volume explicit Runge Kutta time stepping scheme. The results are compared with the respective references and experimental data.A new combined wake /CFD methodology is used to include realistic wake effects in CFD solutions for the rotor flow in hover. The analytical method for predicting the hovering rotor wake is described to investigate the motion of the helical tip vortex. Beginning with the generalized wake model, a Semi Empirical Correction for the vortex core effect on the rotor wake is made. Then on the condition of circulation and wake geometry convergence, the free wake calculation is carried out. Finally, Euler equations are solved for transonic rotor flow employing Jameson’s finite volume explicit Runge Kutta time stepping scheme. The results are compared with the respective references and experimental data.

关 键 词：rotor aerodynamics numerical simulation rotor shock / vortex system FLOW 

分 类 号：V212[航空宇航科学与技术—航空宇航推进理论与工程]