An experimental study on the spreading characteristics and burning behaviors of continuous spill fires under cross flow

被引:9
作者
Ma, Hanchao [1 ]
Zhao, Jinlong [2 ]
Huang, Hong [1 ]
Zhang, Jianping [3 ]
Wang, Zhenhua [2 ]
机构
[1] Tsinghua Univ, Inst Publ Safety Res, Dept Engn Phys, Beijing 100084, Peoples R China
[2] China Univ Min & Technol, Sch Emergency Management & Safety Engn, Beijing 100083, Peoples R China
[3] Ulster Univ, Belfast Sch Architecture & Built Environm, FireSERT, Newtownabbey, North Ireland
基金
中国国家自然科学基金;
关键词
Spill fire; Cross flow; Fuel layer shape; Heat feedback; Burning rate model; SKIN-FRICTION MEASUREMENTS; HEAT FEEDBACK; FUEL SURFACE; POOL FIRES; WIND;
D O I
10.1016/j.icheatmasstransfer.2024.107476
中图分类号
O414.1 [热力学];
学科分类号
摘要
Fuel leakage and spill fires often occur during storage and transportation of liquid fuels. And the spread and burning processes of spill fires are susceptible to cross-air flows. In this paper, spill fire experiments were conducted on a fireproof glass (with or without ignition) under different wind speeds (0-2 m/s). The effects of wind on the spread process and burning behaviors were analyzed. Results showed that, for the cases without ignition, the spread length could vary in a non-linear manner with wind speed. And a spread length model was developed based on force analysis. For spill fires under small wind speeds, the burning area increased firstly, followed by a decrease before stabilization. When the wind speed exceeded a critical value, the fuel layer spread rapidly in the upwind direction after the shrinking phase. The steady stage was observed for all tests. With the wind speed increase, the quasi-steady burning area changes from being circular to elliptic first, before it gradually became circular in the end. To explain this process, a detailed heat transfer analysis was conducted. Considering the fuel layer shape and the heat transfer characteristics of spill fires, an analytical burning rate model was developed.
引用
收藏
页数:14
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