基于CFD研究等离子体环量控制流场特性

摘要

为了研究等离子体气动激励射流在翼型钝尾缘产生Coanda效应时对流场特性的影响，基于雷诺平均N-S方程中添加体积力源项的唯象学仿真方法，建立并优化了等离子体环量控制的数值计算模型，研究了基于分离点的不同激励器位置对流场的影响规律。结果表明，优化激励器位置后环量控制的效费比ΔCL／Cμ最高可以达到113．49。分析发现，当等离子体激励产生的激励射流刚好可以将分离点推移至压力面时，机翼有效弯度增加最为明显，激励效果最好。%In order to find out the influence of the dielectric-barrier-discharge ( DBD) plasma actuation jet on the flow characteristic of the airfoil′s trailing-edge,with a method of adding the body force source terms to the Reynolds-averaged Navier-Stokes equations ,we indicated the influence mechanism of plas-ma actuator′s location.The result shows the lift augmentation efficiency can reach 113.49 after optimizing the plasma actuator′s location .The optimal solution and data analysis shows when the high speed airflow just can pull the separation point to the lower surface ,the plasma actuation′s effect becomes the best .