论文标题
DBD-PA诱导的静态空气中的体力和NACA0015的分离流量的模型比较
Model comparison of DBD-PA-induced body force in quiescent air and separated flow over NACA0015
论文作者
论文摘要
介电屏障排放血浆致动器（DBD-PA）诱导的血浆流量的数值模拟是通过两个不同的身体模型进行的：Suzen-huang（S-H）模型和漂移扩散（D-D）模型。研究了在连续致动中在平板上静出空气中产生的诱导流动，并研究了基于PA的流量控制效应，在NACA0015上方分离的流动中具有爆发致动。在比较研究中，首先在静态场中研究了体力场和诱导的速度场，以查看空间差异和单个放电周期中的时间差。 D-D体力是用裸露电极的齐平安装和凸起配置计算的，该电极以7kV和10kV的峰值峰值AC电压进行操作。 D-D模型在AC功率的正进行阶段时会产生瞬时更高的体力，但是比DC = 0.0117的S-H模型激活的流动区域更小，该模型由实验事先在7KV处进行。在下游流动中测得的7kV处的D-D凸起病例的局部诱导速度与实验结果是最好的一致性。在S-H病例中，DC = 0.0117的最大壁并联感应速度与实验中的最大诱导速度一致，但是，局部诱导的速度在不同的流量结构的情况下相对较高。在以12度和雷诺数为63000的攻击角上的倒数后流量中，7KV处的D-D凸起模型的d-d凸起模型的效果大致与S-H模型相同的效果与以前证明足以实现对照性能相同。
Numerical simulations of plasma flow induced by dielectric barrier discharge plasma actuators (DBD-PA) are conducted with two different body-force models: Suzen-Huang (S-H) model and drift-diffusion (D-D) model. The induced flow generated in quiescent air over a flat plate in continuous actuation and the PA-based flow control effect with burst actuation in separated flow over NACA0015 is studied. In the comparative study, the body-force field and the induced velocity field are firstly investigated in the quiescent field to see the spatial difference and the temporal difference in a single discharge cycle. The D-D body force is computed with flush-mounted and bulge configuration of the exposed electrode, which is operated at the peak-to-peak AC voltage of 7kV and 10kV. The D-D models generate momentarily higher body force in the positive-going phase of the AC power, but activate a smaller flow region than the S-H model with Dc = 0.0117, which is given by the experiment beforehand at 7kV. The local induced velocity of the D-D bulge case at 7kV measured in the downstream flow has the best agreement with the experimental result. The maximum wall-parallel induced velocity in the S-H case with Dc = 0.0117 is consistent with that in the experiment, however, the local induced velocity is relatively high with different flow structures. In the post-stall flow over the airfoil at the angle of attack of 12 degrees and Reynolds number of 63000, the D-D bulge model at 7kV has approximately the same effect of leading-edge suction enhancement and reattachment promotion as the S-H model with Dc = 0.16, which was previously proved to be sufficiently high to achieve the control performance.
