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Experimental Study on the Burning Characteristics of Transformer Oil Pool Fires
journal contribution
posted on 2020-03-25, 18:39 authored by Jinlong Zhao, Shansheng Wang, Jianping Zhang, Rui Zhou, Rui YangThis paper examines experimentally
the burning behaviors of transformer
oil pool fires. A series of transformer oil pool fire tests with different
pool diameters (0.2–1 m) were conducted. The mass burning rate,
flame height, liquid layer temperature, flame temperature, and radiative
heat flux were measured and analyzed. A new correlation for the mass
burning rate as a function of pool diameter is deduced. The experimental
flame height is compared to existing correlations, and it is found
that the present result is in better agreement with those deduced
for heavy oils. The liquid temperature results show that the fuel
layer consists of a boiling layer and a gradient layer, and the thickness
of the boiling layer is found to be around 2.6 mm independent of the
pool diameter. The flame temperature is also analyzed and three zones
are observed, for which a piecewise function is deduced. The radiation
fraction and the emissive power of the flame are determined, respectively,
based on the source flame model and solid flame model, and an exponential
decay of the radiation fraction as a function of pool diameter is
obtained. The present results are important for estimation of thermal
radiation from a pool fire on the surrounding objects in practical
transformer oil fires.