Robust Navier-Stokes method for predicting unsteady flowfield and aerodynamic characteristics of helicopter rotor

• DOI: 10.1016/j.cja.2017.10.005
• Publication Date: 2017-10-16T04:32:17Z
• Authors: Qijun ZHAO; Guoqing ZHAO; Bo WANG; Qing WANG; Yongjie SHI; Guohua XU
• Keywords: Solver; Helicopter rotor

A robust unsteady rotor flowfield solver CLORNS code is established to predict the complex aerodynamic characteristics of flowfield. In order handle difficult problem about grid generation around with shape in this CFD code, a parameterized generated method established, and moving-embedded grids are constructed by several proposed universal methods. work, Reynolds-Averaged Navier-Stokes (RANS) equations Spalart-Allmaras selected as governing helicopter rotor. The discretization convective fluxes accomplished employing second-order central difference scheme, third-order MUSCL-Roe fifth-order WENO-Roe scheme. Aimed at simulating rotor, dual-time scheme implicit LU-SGS employed accomplish temporal discretization. improve computational efficiency hole-cells donor elements searching technology, "disturbance diffraction method" "minimum distance work. To efficiency, Message Passing Interface (MPI) parallel based on subdivision grid, local preconditioning Full Approximation Storage (FAS) multi-grid combined code. By comparison numerical results simulated test data, it illustrated that present could simulate loads noise accurately.