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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14006-014006.doi: 10.1088/2058-6272/aa8e95

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

Study of vortex in flow fields induced by surface dielectric barrier discharge actuator at low pressure based on Q criterion

Zheng ZHANG (张政), Xueke CHE (车学科), Wangsheng NIE (聂万胜), Jinlong LI (李金龙) , Tikai ZHENG (郑体凯), Liang LI (李亮), Qinya CHEN (陈庆亚) and Zhi ZHENG (郑直)   

  1. Equipment Academy, Beijing 101416, People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

Study of vortex in flow fields induced by surface dielectric barrier discharge actuator at low pressure based on Q criterion

Zheng ZHANG (张政), Xueke CHE (车学科), Wangsheng NIE (聂万胜), Jinlong LI (李金龙) , Tikai ZHENG (郑体凯), Liang LI (李亮), Qinya CHEN (陈庆亚) and Zhi ZHENG (郑直)   

  1. Equipment Academy, Beijing 101416, People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07
  • Supported by:

    This work was supported by National Natural Science Foundation of China under Contract Nos. 11205244, 51076168, 91441123 and 51222701.

Abstract:

Flow fields induced by a surface dielectric barrier discharge actuator at low pressure of 7 kPa are measured by particle image velocimetry. The distribution of local vortices in the flow field is revealed by the Q criterion. The reason for the generation of vortices is analyzed and the influence of pulse frequency and duty cycle on vortices is studied. The results show that the Q criterion can reveal the small-scale vortices, which cannot be indicated by the streamline. The direction transition zone where the induced jet moves from the vertical to the tangential and the shear layer between the jet and stationary air are prone to the generation of strong vortices.
The influence of pulse frequency on vortices is not obvious, but the variation of duty cycle can significantly affect the strength and distribution of vortices.

Key words: low pressure, SDBD, induced field, Q criterion, vortex

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