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Experimental study on the effect of substrate slope on continuously released heptane spill fires

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Abstract

The slope of ground has a significant impact on the spread and burning process for spill fires on land. In this paper, a series of continuous spill fire experiments were conducted on a fireproof glass sheet with different slope angles (0.5°, 1°, 3°) to study the effects of slope on fuel spread and burning behaviors. The results show that the spread process can be divided into four phases based on time-dependent spread area. The maximum spread area and spread rate both increased greatly with increasing slope angle for a constant discharge rate, while the effect of slope on the steady burning area was only slight. The burning rate in the quasi-steady burning phase tends to be a little lower with increasing slope. It is proved that the burning rate at the quasi-steady burning phase is lower than that of pool fires under the same burning size and the corresponding ratio is close to 0.32, independent on the discharge rate and the slope angle. Then, a simple modification coefficient was introduced and a burning rate model of spill fires was developed, which provide a basis for liquid layer simulation under the burning conditions.

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Acknowledgements

This study was sponsored by the National Key R&D Program of China National Key R&D Program of China(2018YFC0808100)and the National Natural Science Foundation of China (Grant Nos. U1633203, U1733126, 51874313, 51906253).

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Authors and Affiliations

  1. Civil Aviation Flight University of China, Guanghan, 618307, China

    Quanyi Liu & Zhihao Lv

  2. Faculty of Resources and Safety Engineering, China University of Mining and Technology, Beijing, China

    Jinlong Zhao & Hongqing Zhu

  3. Department of Engineering Physics, Institute of Public Safety Research, Tsinghua University, Beijing, China

    Jinlong Zhao & Rui Yang

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  1. Quanyi Liu
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  2. Jinlong Zhao
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Liu, Q., Zhao, J., Lv, Z. et al. Experimental study on the effect of substrate slope on continuously released heptane spill fires. J Therm Anal Calorim 140, 2497–2503 (2020). https://doi.org/10.1007/s10973-019-08998-9

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  • DOI: https://doi.org/10.1007/s10973-019-08998-9

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