Experimental study on the liquid layer spread and burning behaviors of continuous heptane spill fires
•The entire spread process was described and divided into four spread phases.•The heat transfer process between the heptane layer and the glass was analyzed and the main heat loss in each phase was determined for continuous heptane spill fires.•A modified burning rate model of spill fires is develop...
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Veröffentlicht in: | Process safety and environmental protection 2019-02, Vol.122, p.320-327 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | •The entire spread process was described and divided into four spread phases.•The heat transfer process between the heptane layer and the glass was analyzed and the main heat loss in each phase was determined for continuous heptane spill fires.•A modified burning rate model of spill fires is developed by considering the heat loss of the spread liquid layer.
Spill fires usually occur with liquid fuel storage and transportation, which may pose a threat to process safety and environmental protection. Analysis on the liquid layer spread and burning behavior is vital for preventing and mitigating spill fire accidents. In the study, a number of heptane continuous spill fire experiments on a fireproof glass sheet were conducted to better understand the spreading and burning of continuous spill fires. In the experiments, the liquid surface area, burning rate and heat transfer between liquid layer and the glass sheet were analyzed. The results showed that the heptane burning rate of spill fires was lower than that for pool fires of the same burning size. The experimental data showed that the radiative penetration through the liquid layer was mainly responsible for the lower burning rate at the quasi-steady burning phase. Based on the heat transfer process, a modified burning rate model of spill fires by considering the heat loss of liquid layer was developed and validated by the experimental data. |
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ISSN: | 0957-5820 1744-3598 |
DOI: | 10.1016/j.psep.2018.12.021 |