| Title |
Flashover Characteristics of the Horizontal Air Gaps Caused by Combustion Flames |
| Authors |
In-Sik Kim ; Lee-Kook Kim ; Chung-Nyun Kim ; Seung-wook Jee ; Sang-Woo Lee ; Kwang-Sik Lee |
| Abstract |
In this paper, characteristics of the ac and dc flashover voltage in the horizontal air gap of a needle-needle electrode system were investigated when the combustion flame was present near the high-voltage electrode. In order to examine the flashover phenomena and the corona inception voltages caused by flame, we measured the voltage and current waveforms when the corona and the flashover was occurred. We also observed, as increasing the applied voltages, the deflection or fluctuation phenomena in the shape of flames caused by the corona wind and the coulomb"s force. As the results of an experimental investigation, we found that the reduction of flashover voltages, in comparison with the no-flame case, are 62.7[%] for k=1.0, 34.2[%] for h=5[cm], 27.3[%] for h=7[cm] and 21.4[%] for h=9[cm] when ac voltage is applied. |