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

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  • Ding, Long
  • Gong, Changzhi
  • Ge, Fanliang
  • Ji, Jie

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.

Suggested Citation

  • Ding, Long & Gong, Changzhi & Ge, Fanliang & Ji, Jie, 2021. "Experimental study on flame radiation characteristic from line pool fires of n-heptane fuel in open space," Energy, Elsevier, vol. 218(C).
    • Handle: RePEc:eee:energy:v:218:y:2021:i:c:s0360544220325421
    DOI: 10.1016/j.energy.2020.119435
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    References listed on IDEAS

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    1. Kozarac, Darko & Taritas, Ivan & Vuilleumier, David & Saxena, Samveg & Dibble, Robert W., 2016. "Experimental and numerical analysis of the performance and exhaust gas emissions of a biogas/n-heptane fueled HCCI engine," Energy, Elsevier, vol. 115(P1), pages 180-193.
    2. Amjad, A.K. & Khoshbakhi Saray, R. & Mahmoudi, S.M.S. & Rahimi, A., 2011. "Availability analysis of n-heptane and natural gas blends combustion in HCCI engines," Energy, Elsevier, vol. 36(12), pages 6900-6909.
    3. Qian, Yong & Wang, Xiaole & Zhu, Lifeng & Lu, Xingcai, 2015. "Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels," Energy, Elsevier, vol. 88(C), pages 584-594.
    4. Ji, Jie & Gong, Changzhi & Wan, Huaxian & Gao, Zihe & Ding, Long, 2019. "Prediction of thermal radiation received by vertical targets based on two-dimensional flame shape from rectangular n-heptane pool fires with different aspect ratios," Energy, Elsevier, vol. 185(C), pages 644-652.
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    Cited by:

    1. Chen, Jian & Song, Ye & Yu, Yueyang & Xiao, Guoqing & Tam, Wai Cheong & Kong, Depeng, 2022. "The influence of a plate obstacle on the burning behavior of small scale pool fires: An experimental study," Energy, Elsevier, vol. 254(PB).
    2. Li, Manhou & Xu, Zhiguo & Luo, Qiuting & Wang, Changjian, 2023. "Investigation of bicubic flame radiation model of continuously opposed spilling fire over n-butanol fuel," Energy, Elsevier, vol. 272(C).
    3. Deng, Lei & Shi, Congling & Li, Haoran & Wan, Mei & Ren, Fei & Hou, Yanan & Tang, Fei, 2023. "Prediction of energy mass loss rate for biodiesel fire via machine learning and its physical modeling of flame radiation evolution," Energy, Elsevier, vol. 275(C).
    4. Luo, Sai & Xu, JingBo & Wang, Chen & Ji, Jie, 2023. "Experimental study of flame spread behavior and heat transfer mechanism over n-butanol fuel in trays of different widths," Energy, Elsevier, vol. 282(C).
    5. Li, Manhou & Han, Guangzhao & Geng, Shuwei, 2022. "Experimental study and new-proposed mathematical correlation of flame height of rectangular pool fire with aspect ratio and mass burning rate," Energy, Elsevier, vol. 255(C).

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