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Experimental investigation on flame spread over jet fuel with influence of external heat radiation

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  • Li, Manhou
  • Han, Guangzhao
  • Pan, Yang
  • Sun, Lida
  • Li, Quan
  • Meng, Weijing

Abstract

The development of liquid fires commonly accompanies with the external heat radiation. This subject concentrates on the laboratory-scale experiments (100 cm × 4.4 cm × 2.0 cm) on flame spread over jet fuel of RP-3 with radiant heat fluxes of 1.1, 1.69, 2.25, 2.8 and 3.6 kW/m2. The results show that the flame behaviors, subsurface flow and heat transfer mechanism depend strongly on the intensity of external heat flux. The measurements of flame pulsation frequency and flame spread rate verify that they increase significantly initially but augment slightly afterwards with the externally applied heat flux, indicating that the heat flux is principally used for raising the liquid’s temperature in the initial stage of flame spreading. The heat exchanges involving flame spread process, namely, external heat radiation, convective heat flux, conductive heat flux, flame radiation, and re-radiant heat losses are analyzed. The energy calculation model confirms that the total heat flux is approximately equal to the sum of heat fluxes from radiant panel and convective flow. The scaling analysis of velocity of subsurface flow proves that it should be linearly related to the externally applied heat flux in the correlation of us∼q˙er2/3.

Suggested Citation

  • Li, Manhou & Han, Guangzhao & Pan, Yang & Sun, Lida & Li, Quan & Meng, Weijing, 2020. "Experimental investigation on flame spread over jet fuel with influence of external heat radiation," Energy, Elsevier, vol. 208(C).
    • Handle: RePEc:eee:energy:v:208:y:2020:i:c:s0360544220314420
    DOI: 10.1016/j.energy.2020.118335
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    References listed on IDEAS

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    1. Wan, Huaxian & Gao, Zihe & Ji, Jie & Zhang, Yongming, 2019. "Experimental study on flame radiant heat flux from two heptane storage pools and its application to estimating safety distance," Energy, Elsevier, vol. 182(C), pages 11-20.
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    Citations

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    Cited by:

    1. Wang, Chen & Ji, Jie, 2023. "Experimental study of dynamic combustion behavior and heat transfer of heptane pool fire with burning time under thin fuel thickness (2.0 mm–14.0 mm)," Energy, Elsevier, vol. 270(C).
    2. 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).
    3. Yang, Jianfeng & Zhang, Bo & Chen, Liangchao & Diao, Xu & Hu, Yuanhao & Suo, Guanyu & Li, Ru & Wang, Qianlin & Li, Jinghai & Zhang, Jianwen & Dou, Zhan, 2023. "Improved solid radiation model for thermal response in large crude oil tanks," Energy, Elsevier, vol. 284(C).
    4. Madruga, Santiago & Mendoza, Carolina, 2022. "Introducing a new concept for enhanced micro-energy harvesting of thermal fluctuations through the Marangoni effect," Applied Energy, Elsevier, vol. 306(PA).
    5. Wang, Chen & Hu, Haowei & Zhang, Hao & Ji, Jie & Wang, Zhigang, 2022. "Experimental study of the horizontal subsurface flow trajectory and dynamic external radiation of flame spread over diesel," Energy, Elsevier, vol. 260(C).

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