为优化等离子体气动激励器电极构型布局形式，保持激励强度不变（电压为16 kV，频率为14 kHz），采用数值模拟的方法，对比分析了吹风比为0.4、0.7、1.0、1.3时直条形、波浪形和直角形3种电极构型激励器对平板气膜冷却特性的影响。研究结果表明，诱导静止空气流动方面，直条形电极构型激励器仅具有流向诱导能力，流场展向方向上不存在对涡结构，直角形和波浪形电极构型激励器具有流向和展向诱导能力，其中直角形电极构型激励器流场展向方向上涡对的涡核间距小、涡结构尺寸大；改善气膜冷却效果方面，直条形电极仅对肾形涡对起到流向方向的下洗诱导作用，提高气膜冷却效果最差，其他两种类型电极均诱导气膜冷却流场展向两侧形成逆反向旋转涡对，抑制了肾形涡对的发展，改善气膜冷却效果显著；三种电极构型等离子体激励器下气膜冷却效率提高百分比均随着吹风比的增大而降低，吹风比为0.4时直条形、波浪形和直角形电极构型面平均气膜冷却效率分别提高了5.52%、42.56%、92.47%。

To optimize the electrode configuration of the plasma aerodynamic actuator, we conducted a comprehensive numerical analysis. This study explored the effects of stripe, wave, and rectangular shaped electrode configurations on the film cooling characteristics at blowing ratios of 0.4, 0.7, 1.0, and 1.3. Throughout this investigation, the voltage was consistently held at 16 kV, and the frequency was maintained at 14 kHz. The results indicate that in terms of quiescent flow field, the stripe-shaped actuator solely induces flow in the streamwise flow direction, without generating any vortex structures in the spanwise direction of the flow field. In contrast, both the wave-shaped and rectangular-shaped actuators are capable of inducing flow in both the streamwise and spanwise directions. Significantly, the rectangular-shaped actuator forms a vortex structure characterized by smaller spacing and larger size. In terms of improving the film cooling performance, the stripe-shaped actuator only exerts a downstream induction effect on the counter-rotating vortex pair in the streamwise direction, resulting in the worst improvement in the film cooling effect. The other two types of actuators induce the formation of anti-counter rotating vortex pairs on both sides of the film cooling flow field, which suppresses the development of kidney-shaped vortex pairs and significantly enhances the film cooling effect. The efficacy of film cooling effectiveness enhancement with three electrode configuration of plasma actuator decreases with the increase of blowing ratios. Specifically, at a blowing ratio of 0.4, the average film cooling efficiency is increased by 5.52%, 42.56%, and 92.47% when stripe, wave, and rectangular actuators are employed, respectively.

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