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    Effect of AC electric fields on flame spread over electrical wire

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    Type
    Article
    Authors
    Kim, Minkuk
    Chung, Suk Ho cc
    Fujita, Osamu cc
    KAUST Department
    Clean Combustion Research Center
    Combustion and Laser Diagnostics Laboratory
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2011
    Permanent link to this record
    http://hdl.handle.net/10754/561596
    
    Metadata
    Show full item record
    Abstract
    The effect of electric fields on the characteristics of flame spread over insulated electrical wire has been investigated experimentally by varying AC voltage and frequency applied to the wire in the normal gravity condition. The polyethylene (PE) insulated electrical wire was placed horizontally on electrically non-conducting posts and one end of the wire was connected to the high voltage terminal. Thus, the electrical system is the single electrode configuration. The wire was ignited at one end and the flame spread rate along the wire has been measured from the images using a video camera. Two distinct regimes existed depending on the applied AC frequency. In the low frequency regime, the flame spread rate decreased with the frequency and voltage. While in the high frequency regime, it decreased initially with voltage and then increased. At high frequency, the spread rate was even over that without applying electric fields. This result implies that fire safety codes developed without considering the effect of electric fields may require modifications. © 2010 Published by Elsevier Inc. on behalf of The Combustion Institute. All rights reserved.
    Citation
    Kim, M. K., Chung, S. H., & Fujita, O. (2011). Effect of AC electric fields on flame spread over electrical wire. Proceedings of the Combustion Institute, 33(1), 1145–1151. doi:10.1016/j.proci.2010.06.155
    Sponsors
    This work was supported by AEA Project/KAUST and by "Ground-Based Research Program for Space Utilization" by Japan Space Forum (2006-09).
    Publisher
    Elsevier BV
    Journal
    Proceedings of the Combustion Institute
    DOI
    10.1016/j.proci.2010.06.155
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.proci.2010.06.155
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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