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• Wang, X
• Yao, C
• Sun, C
• Yang, Q
• Zhang, X
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• Sun, C
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• Zhang, X
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• Yao, C
• Sun, C
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Energies 2012, 5(5), 1433-1454; doi:10.3390/en5051433

Article

Numerical Modelling of Mutual Effect among Nearby Needles in a Multi-Needle Configuration of an Atmospheric Air Dielectric Barrier Discharge

Xiaojing Wang* , Chenguo Yao, Caixin Sun ^† , Qing Yang and Xiaoxing Zhang

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China ^† Deceased on 25 November 2011.

* Author to whom correspondence should be addressed.

Received: 29 March 2012; in revised form: 23 April 2012 / Accepted: 2 May 2012 / Published: 15 May 2012

Download PDF Full-Text [3996 KB, uploaded 15 May 2012 13:57 CEST]

Abstract: A numerical study has been conducted to understand the mutual effect among nearby needles in a multi-needle electrode dielectric barrier discharge. In the present paper, a fluid-hydrodynamic model is adopted. In this model, the mutual effect among nearby needles in a multi-needle configuration of an atmospheric air dielectric barrier discharge are investigated using a fluid-hydrodynamic model including the continuity equations for electrons and positive and negative ions coupled with Poisson’s equation. The electric fields at the streamer head of the middle needle (MN) and the side needles (SNs) in a three-needle model decreased under the influence of the mutual effects of nearby needles compared with that in the single-needle model. In addition, from the same comparison, the average propagation velocities of the streamers from MN and SNs, the electron average energy profile of MN and SNs (including those in the streamer channel, at the streamer head, and in the unbridged gap), and the electron densities at the streamer head of the MN and SNs also decreased. The results obtained in the current paper agreed well with the experimental and simulation results in the literature.

Keywords: dielectric barrier discharge (DBD); streamer; fluid-hydrodynamic model; multi-needle configuration

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