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http://dx.doi.org/10.3795/KSME-B.2011.35.3.321

Effect of Applied DC Electric Fields in Flame Spread over Polyethylene-Coated Electrical Wire  

Jin, Young-Kyu (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.)
Kim, Min-Kuk (Clean Combustion Research Center, King Abdullah University of Science and Technology.)
Park, Jeong (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.)
Chung, Suk-Ho (Clean Combustion Research Center, King Abdullah University of Science and Technology.)
Yun, Jin-Han (Environmental & Energy Systems Research Division, Korea Institute of Machinery and Materials)
Keel, Sang-In (Environmental & Energy Systems Research Division, Korea Institute of Machinery and Materials)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.3, 2011 , pp. 321-330 More about this Journal
Abstract
We experimentally investigated the effect of applied DC electric fields on the flame spread over polyethylene-coated electrical wire. The flame-spread rates over electrical wire with negative and positive DC electric fields from 0 to ${\pm}7$ kV were measured and analyzed. We compared the results for DC electric fields with previous results for AC electric fields. We explored whether or not various flame shapes could be obtained with DC electric fields and the main reason for the flame-spread acceleration, particularly at the end of the electrical wire, for AC electric fields. We found that DC electric fields do not significantly affect the flame-spread rates. However, the flame shape is mildly altered by the ionic wind effect even for DC electric fields. The flame-spread rate is relevant to the flame shape and the slanted direction in spite of the mild impact. A possible explanation for the flame spread is given by a thermal-balance mechanism and fuel-vapor jet.
Keywords
DC Electric Field; Polyethylene-Coated Electrical Wire; Flame Spread Rate; Fuel-Vapor Jet;
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