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针对单独螺旋桨模型,基于动态结构网格搭接技术,采用CFD方法对其非定常流场进行了数值模拟。首先针对全部外形生成多块点搭接和面搭接两套计算网格,通过分析两套网格的计算结果,验证动态网格搭接技术的可行性和正确性,得出螺旋桨性能参数随转速的变化规律。在此基础上分析了雷诺平均NS(RANS)方程和Euler方程的数值模拟结果。最后研究了攻角对单独螺旋桨性能参数的影响。研究结果表明:动态网格搭接技术能够很好地模拟非定常螺旋桨的性能参数。螺旋桨的拉力系数和功率系数都随着转速的增加而增大。对螺旋桨非定常流场进行数值模拟时,采用Euler方程就能够满足工程精度的需求。攻角0度时单片桨叶的拉力系数和转矩系数都是恒值,而在攻角10度时却都呈现出周期性的正弦曲线。
For the single propeller model, the CFD method is used to simulate the unsteady flow field based on the dynamic structural grid overlap technique. Firstly, two sets of calculation grids of point lap and surface lap are generated for all appearances. By analyzing the calculation results of two sets of grids and verifying the feasibility and correctness of the dynamic grid lapping technique, the performance parameters of the propeller Speed of change. On this basis, numerical simulation results of Reynolds-averaged Navier-Stary equations (NSANS) and Euler equations are analyzed. Finally, the influence of angle of attack on the performance parameters of single propeller is studied. The results show that the dynamic grid overlap technique can well simulate the performance parameters of unsteady propeller. The propeller’s pull coefficient and power coefficient both increase with the rotation speed. When the unsteady flow field of propeller is numerically simulated, the Euler equation can meet the needs of engineering accuracy. The 0 ° angle of attack when a single blade pull coefficient and torque coefficient are constant, but at 10 degrees of attack, but they have shown a periodical sinusoidal curve.