Experimental study on flame radiation characteristic from line pool fires of n-heptane fuel in open space

Long Ding, Changzhi Gong, Fanliang Ge and Jie Ji

Energy, 2021, vol. 218, issue C

Abstract: This study experimentally investigated the flame radiation characteristic of line pool fires in open space. The n-heptane line fires burning in the pools with different aspect ratios of length to width (n) were conducted. The mass loss rate (MLR), radiation distribution (along the flame plane), and radiant fraction are investigated by using wide-view-angle and slit radiometers. Combined with a weighted multiple-point source (WMP) model, a radiant fraction of line pool fire can be derived based on the radiation distribution in a novel way. The results show that MLR rises with increasing n at different increase rate (dm˙/dn) and an obvious bifurcation phenomenon occurs when w = 5 cm, the line pool fires transform into violent turbulent combustion from steady laminar. It is also found that with the increase of n, radiant fraction of line pool fire increases for various w due to the more asymmetric air entrainment and stronger turbulence degree, whose range is 0.28–0.37. A new multi-cylinder flame model has also been proposed for flame radiant fraction calculation, and the errors of results are within a certain degree compared with data calculated by the WMP model.

Keywords: Line pool fire; WMP model; Multi-cylinder flame model; Radiation distribution; Radiant fraction (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:218:y:2021:i:c:s0360544220325421

DOI: 10.1016/j.energy.2020.119435

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