王娜, 叶靓, 戚姝妮. 基于DES方法的倾转旋翼悬停计算研究[J]. 空气动力学学报, 2018, 36(1): 57-63. DOI: 10.7638/kqdlxxb-2017.0105
引用本文: 王娜, 叶靓, 戚姝妮. 基于DES方法的倾转旋翼悬停计算研究[J]. 空气动力学学报, 2018, 36(1): 57-63. DOI: 10.7638/kqdlxxb-2017.0105
WANG Na, YE Liang, QI Shuni. Numerical study for tilt rotor in hover with detached eddy simulations[J]. ACTA AERODYNAMICA SINICA, 2018, 36(1): 57-63. DOI: 10.7638/kqdlxxb-2017.0105
Citation: WANG Na, YE Liang, QI Shuni. Numerical study for tilt rotor in hover with detached eddy simulations[J]. ACTA AERODYNAMICA SINICA, 2018, 36(1): 57-63. DOI: 10.7638/kqdlxxb-2017.0105

基于DES方法的倾转旋翼悬停计算研究

Numerical study for tilt rotor in hover with detached eddy simulations

  • 摘要: 针对倾转旋翼悬停工作状态,在嵌套网格下数值求解非定常Navier-Stokes方程,研究了流场中的流动及旋翼/机翼间气动干扰。在网格系统中,采用了可自适应的背景直角网格,用于精确捕捉流场中的大尺度涡及其他流动细节。涡粘性计算采用了Spalart-Allmaras(SA)的脱体涡模拟(Detached Eddy Simulations,DES)方法。计算结果与相应的雷诺平均Navier-Stokes(Reynolds Averaged Navier-Stokes,RANS)方法结果进行了对比,目的在于考察采用不同计算方法得到的流场结构和气动力差异。计算表明,DES方法更细致地描述了机翼下方的分离流动,桨叶通过机翼上方时拉力变化更剧烈,机翼向下载荷比RANS结果小2.3%左右。

     

    Abstract: Flow fields and aerodynamic interaction phenomenon between rotors and wings are simulated for a tilt rotor model in hover state by solving the unsteady Navier-Stokes equations on embedded grid system. Adaptive Cartesian grid is adopted as background grid, aiming at capturing the large scale vortex and other flow details with advanced accuracy. Eddy viscosity is estimated by the Spalart-Allmaras detached eddy simulations, and flow fields and aerodynamics data are calculated and compared with the corresponding Reynolds averaged Navier-Stokes(RANS) ones. The differences in the results are analyzed and evaluated. It is shown that the flow separation under the wing is described with high precision by the DES method. The blade undergoes intensive lift variation when it passes the region above the wing, and the download of the wing is 2.3% less than the RANS result.

     

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