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所属单位：航空学院

发表刊物：Hangkong Dongli Xuebao

摘要：To overcome the difficulties in generating high quality integrative structured grids around the tiltrotor aircraft, the multi-block grid strategy and embedded grid method were combined to establish a new embedded grid generation method, which was suitable for aerodynamic interaction analyses of tiltrotor aircraft. On the basis of keeping the interpolation accuracy, the whole grid system composed of the multi-block grids was used to reduce the size of the grids. Firstly, the Inverse-Map method was introduced for auxiliary localization, and the new multi-directional projection method was proposed to ensure the continuity of the hole boundaries among the multi-block grids. Then, the independent embedded grid strategy was used in completing the combination of the airframe and background grids, and the assistant coordinates were adopted in the identification of the background boundary grids. Compressible RANS (Reynolds averaged Navier-Stokes) equations with S-A(Spalart-Allmaras) turbulence model were employed in the body-fitted region, and Euler equations were chosen to simulate the background region. In the present method, the SPMD (single program, multiple data) model parallel acceleration technology was adopted to improve the computational efficiency. On this basis, Robin airframe was taken as the numerical example to verify the validity of the present CFD method. Then the interaction flowfields of tiltrotor aircraft in different modes were investigated emphatically, and several simulated results (special fountain effect phenomenon in hover, special flowfield in conversion mode, and variations of the aerodynamic characteristics of the tiltrotor aircraft in cruise) were obtained. The proposed embedded grid method and the numerical method were demonstrated to be effective in investigating the aerodynamic configuration of the tiltrotor aircraft, laying a good foundation for analyzing aerodynamic characteristics of the tiltrotor aircraft, with the speedup greater than 5.0. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.

ISSN号：1000-8055

是否译文：否

发表时间：2017-09-01

合写作者：李鹏,Yin, Jiangli,Zhu, Qiuxian,王博

通讯作者：招启军