A New Single-blade Based Hybrid CFD Method for Hovering and Forward-flight Rotor Computation

作     者：SHI Yongjie ZHAO Qijun FAN Feng XU Guohua 

作者机构：National Key Laboratory of Rotorcraft Aeromechanics Nanjing University of Aeronautics and Astronautics Nanjing 210016 China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2011年第24卷第2期

页      面：127-135页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China (10872094) 

主　　题：hybrid CFD method Euler equations full potential equations wake model rotor helicopters 

摘      要：A hybrid Euler/full potential/Lagrangian wake method,based on single-blade simulation,for predicting unsteady aerodynamic flow around helicopter rotors in hover and forward flight has been *** this method,an Euler solver is used to model the near wake evolution and transonic flow phenomena in the vicinity of the blade,and a full potential equation（FPE） is used to model the isentropic potential flow region far away from the rotor,while the wake effects of other blades and the far wake are incorporated into the flow solution as an induced inflow distribution using a Lagrangian based wake *** further reduce the execution time,the computational fluid dynamics（CFD） solution and rotor wake analysis（including induced velocity up-date） are conducted parallelly,and a load balancing strategy is employed to account for the information exchange between two *** the developed method,several hover and forward-flight cases on Caradonna-Tung and Helishape 7A rotors are *** agreements of the loadings on blade surface with available measured data demonstrate the validation of the ***,the CPU time required for different computation runs is compared in the paper,and the results show that the pre-sent hybrid method is superior to conventional CFD method in time cost,and will be more efficient with the number of blades increasing.