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针对直升机旋涡-桨叶相互作用问题,以其二维简化模型旋涡-翼型相互作用问题为研究对象,发展了基于雷诺平均Navier-Stokes方程和自适应混合笛卡尔网格的流场数值模拟方法,通过给定合适的自适应判据,动态网格自适应技术能够准确捕捉旋涡位置和保持旋涡强度。通过两类旋涡-翼型相互作用问题的数值模拟研究,揭示了旋涡与翼型相互作用过程中产生的复杂流动现象和非定常气动力变化。数值模拟结果与相关文献中的试验数据和数值计算结果吻合,且对三维桨叶的气动载荷研究和振动分析具有指导意义。
Aiming at the problem of the helicopter vortex-blade interaction, the flow field numerical simulation method based on the Reynolds-average Navier-Stokes equation and the adaptive hybrid Cartesian grid is developed based on the problem of the two-dimensional simplified model vortex-airfoil interaction. , Given a suitable adaptive criteria, dynamic grid adaptive technology can accurately capture the vortex position and maintain the vortex intensity. Through the numerical simulation of two types of vortex-airfoil interaction problems, the complex flow phenomena and unsteady aerodynamic changes in the interaction between vortex and airfoil are revealed. The numerical simulation results are in good agreement with the experimental data and numerical results in the related literatures, and are instructive for the aerodynamic load study and vibration analysis of 3D propeller blades.