Effect of core metal on flame spread and extinction for horizontal electrical wire with applied AC electric fields

Abstract The effect of metal core on flame spread behavior over polyethylene (PE)-insulated electrical wire was experimentally investigated by varying applied AC voltage (VAC) and frequency (fAC). present experimental results with Cu-core were compared those conducted previously NiCr-core. Flame rate (FSR) for the baseline case no electric field larger than that Both FSR size appreciably influenced fields behaved differently Cu- NiCr-cores. For Cu-core, could be classified into four regimes as fAC increases: increasing (regime I), decreasing (II), again (III) (IV). While NiCr-core, it has been categorized two I II. qualitatively similar to width in I, II, IV. such a relationship not satisfied regime III, which can attributed formation molten PE film burnt side well globular front spreading edge, emphasizing important role complex behavior. Molten dripping observed while observed. Electrospray di-electrophoresis phenomena occurred along via continuous phenomenon from droplet. When excessive, extinction routes: appreciable reduction (both NiCr-cores) detachment (for Cu-core). These frequencies correlated voltage.