南京航空航天大学学报（英文版）2021，Vol.38Issue(6)：975-983,9.
基于间断伽辽金法的悬停状态旋翼涡流场低耗散数值模拟
Low Dissipation Simulation for Vortex Flowfield of Rotor in Hover Based upon Discontinuous Galerkin Method
摘要
Abstract
The discontinuous Galerkin(DG)method is established and innovatively conducted on accurately simulating the evolution of blade-tip vortex and the aerodynamic characteristics of helicopter rotor.Firstly,the Reynolds-Averaged Navier-Stokes(RANS)equations in rotating reference frame are employed,and the embedded grid system is developed with the finite volume method(FVM)and the DG method conducted on the blade grid and background grid respectively.Besides,the Harten-Lax-Van Leer contact(HLLC)scheme with high-resolution and low-dissipation is employed for spatial discretization,and the explicit third-order Runge-Kutta scheme is used to accomplish the temporal discretization.Secondly,the aerodynamic characteristics and the evolution of blade-tip vortex for Caradonna-Tung rotor are simulated by the established CFD method,and the numerical results are in good agreement with experimental data,which well validates the accuracy of the DG method and shows the advantages of DG method on capturing the detailed blade-tip vortex compared with the FVM method.Finally,the evolution of tip vortex at different blade tip Mach numbers and collective pitches is discussed.关键词
桨尖涡/间断伽辽金法/N-S方程/气动特性/直升机旋翼Key words
blade-tip vortex/discontinuous Galerkin(DG)method/Navier-Stokes(N-S)equations/aerodynamic characteristics/helicopter rotor分类
航空航天引用本文复制引用
卞威,招启军,赵国庆..基于间断伽辽金法的悬停状态旋翼涡流场低耗散数值模拟[J].南京航空航天大学学报（英文版）,2021,38(6):975-983,9.基金项目
This work was supported by the Na-tional Natural Science Foundation of China(Nos.12072156,12032012),the Foundation of Rotor Aerodynamic Key Lab-oratory(No.RAL20190102),and the Priority Academic Program Development Project of Jiangsu Higher Education Institutions(PAPD). （Nos.12072156,12032012）
