| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Electric ignition energy evaluation and the energy distribution structure of energy released in electrostatic discharge process |
| Qingming Liu(刘庆明)1, Jinxiang Huang(黄金香)1, Huige Shao(邵惠阁)1, Yunming Zhang(张云明)2 |
1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
2. Department of Fire Protection Engineering, Chinese People's Armed Police Force Academy, Langfang 065000, China |
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Abstract Ignition energy is one of the important parameters of flammable materials, and evaluating ignition energy precisely is essential to the safety of process industry and combustion science and technology. By using electric spark discharge test system, a series of electric spark discharge experiments were conducted with the capacitor-stored energy in the range of 10 J, 100 J, and 1000 J, respectively. The evaluation method for energy consumed by electric spark, wire, and switch during capacitor discharge process has been studied respectively. The resistance of wire, switch, and plasma between electrodes has been evaluated by different methods and an optimized evaluation method has been obtained. The electric energy consumed by wire, electric switch, and electric spark-induced plasma between electrodes were obtained and the energy structure of capacitor-released energy was analyzed. The dynamic process and the characteristic parameters (the maximum power, duration of discharge process) of electric spark discharge process have been analyzed. Experimental results showed that, electric spark-consumed energy only accounts for 8%-14% of the capacitor-released energy. With the increase of capacitor-released energy, the duration of discharge process becomes longer, and the energy of plasma accounts for more in the capacitor-released energy. The power of electric spark varies with time as a damped sinusoids function and the period and the maximum value increase with the capacitor-released energy.
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Received: 13 June 2017
Revised: 28 July 2017
Accepted manuscript online:
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PACS:
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52.80.-s
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(Electric discharges)
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52.77.-j
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(Plasma applications)
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52.75.Kq
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(Plasma switches (e.g., spark gaps))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11572044) and the National Key Research and Development Program of China (Grant No. 2017YFC0804705). |
Corresponding Authors:
Qingming Liu
E-mail: qmliu@bit.edu.cn
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Cite this article:
Qingming Liu(刘庆明), Jinxiang Huang(黄金香), Huige Shao(邵惠阁), Yunming Zhang(张云明) Electric ignition energy evaluation and the energy distribution structure of energy released in electrostatic discharge process 2017 Chin. Phys. B 26 105202
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