Citation SearchQuick Search

Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (10): 105503.doi: 10.1088/2058-6272/aacdf0

• Plasma Technology • Previous Articles    

Effect of DBD plasma excitation characteristics on turbulent separation over a hump model

Lu MA (马璐), Xiaodong WANG (王晓东), Jian ZHU (祝健) and Shun KANG (康顺)   

  

  1. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, North China Electric Power University, Beijing 102206, People’s Republic of China
  • Received:2018-04-03 Published:2018-06-20
  • Supported by:
    This work was supported by National Natural Science Foundation of China (No. 51576065), and the Fundamental Research Funds for the Central Universities (Nos. 2015CY05, 2018QN037, 2018ZD09).

Abstract:

In this paper, the effect of dielectric-barrier discharge plasma excitation characteristics on turbulent boundary layer separation over a hump is investigated using computational fluid dynamics. Four different turbulence models were used for verification. The Reynolds stress model showed the best agreement with the experimental data, in general. Based on the verification and validation, the effect of duty cycle and excitation frequency on the turbulent flow separation were investigated. The results showed that the pulsed plasma excitation could effectively suppress the flow separation by mixing augmentation. With increasing duty cycle and excitation frequency, the flow separation first increased, then decreased again. The optimal duty cycle was 0.75 and the optimal excitation frequency was 50 Hz.

Key words: flow control, numerical simulation, DBD plasma, excitation frequency