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所属单位：航空学院

发表刊物：CHINESE JOURNAL OF AERONAUTICS

关键字：Aerodynamic characteristics Helicopter rotor Moving-embedded grid Navier-Stokes equations Upwind schemes

摘要：A robust unsteady rotor flowfield solver CLORNS code is established to predict the complex unsteady aerodynamic characteristics of rotor flowfield. In order to handle the difficult problem about grid generation around rotor with complex aerodynamic shape in this CFD code, a parameterized grid generated method is established, and the moving-embedded grids are constructed by several proposed universal methods. In this work, the unsteady Reynolds-Averaged Navier-Stokes (RANS) equations with Spalart-Allmaras are selected as the governing equations to predict the unsteady flowfield of helicopter rotor. The discretization of convective fluxes is accomplished by employing the second-order central difference scheme, third-order MUSCL-Roe scheme, and fifth-order WENO-Roe scheme. Aimed at simulating the unsteady aerodynamic characteristics of helicopter rotor, the dual-time scheme with implicit LU-SGS scheme is employed to accomplish the temporal discretization. In order to improve the computational efficiency of hole-cells and donor elements searching of the moving-embedded grid technology, the "disturbance diffraction method" and "minimum distance scheme of donor elements method" are established in this work. To improve the computational efficiency, Message Passing Interface (MPI) parallel method based on subdivision of grid, local preconditioning method and Full Approximation Storage (FAS) multi-grid method are combined in this code. By comparison of the numerical results simulated by CLORNS code with test data, it is illustrated that the present code could simulate the aerodynamic loads and aerodynamic noise characteristics of helicopter rotor accurately. (C) 2018 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics.

ISSN号：1000-9361

是否译文：否

发表时间：2018-02-01

合写作者：赵国庆,王博,王清,史勇杰,徐国华

通讯作者：招启军