论文摘要
In this paper, aerodynamic actuation characteristics of radio-frequency（RF） discharge plasma are studied and a method is proposed for shock wave control based on RF discharge. Under the static condition, a RF diffuse glow discharge can be observed; under the supersonic inflow, the plasma is blown downstream but remains continuous and stable.Time-resolved schlieren is used for flow field visualization. It is found that RF discharge not only leads to continuous energy deposition on the electrode surface but also induces a compression wave. Under the supersonic inflow condition, a weak oblique shock wave is induced by discharge. Experimental results of the shock wave control indicate that the applied actuation can disperse the bottom structure of the ramp-induced oblique shock wave, which is also observed in the extracted shock wave structure after image processing. More importantly, this control effect can be maintained steadily due to the continuous high-frequency（MHz） discharge. Finally, correlations for schlieren images and numerical simulations are employed to further explore the flow control mechanism. It is observed that the vortex in the boundary layer increases after the application of actuation, meaning that the boundary layer in the downstream of the actuation position is thickened. This is equivalent to covering a layer of low-density smooth wall around the compression corner and on the ramp surface, thereby weakening the compressibility at the compression corner. Our results demonstrate the ability of RF plasma aerodynamic actuation to control the supersonic airflow.
论文目录
文章来源
类型: 期刊论文
作者: 杨臻,宋慧敏,王宏宇,郭善广,贾敏,王康
来源: Chinese Physics B 2019年02期
年度: 2019
分类: 基础科学
专业: 力学,物理学
单位: Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University
基金: Project supported by the National Natural Science Foundation of China(Grant Nos.11472306,51407197,and 51507187)
分类号: O53;O354.3
页码: 321-330
总页数: 10
文件大小: 1931K
下载量: 18
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