中文摘要：

为揭示马蹄形等离子体激励器产生的等离子体气动激励提高气膜冷却效率的机理,选取常规圆形气膜孔冷却结构进行了数值模拟比较.结果表明：马蹄形等离子体激励器产生的等离子体气动激励效果可以使射流具有展向扩张能力,肾形涡对的大小及强度得到显著改变,同时受等离子体气动激励产生的下拉诱导和水平加速效果影响,射流贴壁性及覆盖区域大大提高,冷却效率得到强化;相对于圆形气膜孔冷却效果,马蹄形介质阻挡放电气膜冷却结构在吹风比为0.5,1.0和1.5时,冷却效率值相差最大处分别提高了165%,148%和500%.

英文摘要：

To disclose the basic mechanism of enhancing film cooling efficiency by plasma actuation produced from horseshoe plasma actuator,numerical simulation was carried out to investigate the flow field for two types of cylindrical holes with/without horseshoe plasma actuator.Results show that the jet flow has acquired expansibility by plasma actuation and the kidney-shaped vortices are changed significantly.With the pull inducement and actinic acceleration of plasma actuation,the coverage area and adherent of jet flow are improved,so the film cooling efficiency was enhanced.The film cooling efficiency of cylindrical hole with horseshoe plasma actuator is larger than that without horseshoe plasma actuator by about 165%（blowing ratio of 0.5）,148%（blowing ratio of 1.0）and 500%（blowing ratio of 1.5）,respectively.