Fire Whirl Experimental Facility with No Enclosure of Solid Walls: Design and Validation
Fire Whirl Experimental Facility with No Enclosure of Solid Walls: Design and Validation
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DOI：
10.1007/s10694-014-0435-0
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发表时间：
2015-07
期刊：
影响因子：
3.4
通讯作者：
Pengfei Wang;Naian Liu;Linhe Zhang;Yueling Bai;K. Satoh
中科院分区：
文献类型：
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作者：
Pengfei Wang;Naian Liu;Linhe Zhang;Yueling Bai;K. Satoh
本文设计了一种无实体墙围合的火涡装置，用于野外火涡的实验模拟。空气幕用于产生火旋风的产生涡。进行了测试以评估新设施的能力。研究发现，空气幕有一个最佳的倾斜角度来产生稳定的火涡。不同池径下的火焰漩涡实验表明，质量损失率取决于循环速度和满足的无因次火焰高度（其中星号表示无因次变量）。不同池径的连续火焰高度与总火焰高度之比为0.67。中心线温度随归一化高度变化，分别在连续火焰、间歇火焰和羽流区域变化。辐射率计算接近44%。这些结果与文献数据吻合良好，从而充分验证了新装置产生稳定火涡的能力。详细讨论了新装置的一些潜在应用。特别值得一提的是，新设施可以使用红外摄像机等仪器来研究火焰漩涡的火焰辐射。
In this work, a fire whirl facility with no enclosure of solid walls was designed, for experimental simulation of fire whirls in open field. Air curtains were used to produce the generating eddy of fire whirl. Tests were conducted to evaluate the capability of the new facility. It was found that there was an optimal tilt angle for the air curtains to produce stable fire whirls. Experiments of fire whirls under different pool diameters showed that the mass loss ratedepended on the circulationbyand the dimensionless flame height satisfied(where the asterisks denote dimensionless variables). It was also found that the ratio of the continuous flame height to the whole flame height for different pool diameters was 0.67. The centerline temperatures varied with the normalized heightby,and, respectively in the regions of the continuous flame, intermittent flame and plume. The radiative fraction was calculated to be close to 44%. All these results fit well with literature data, thereby the capability of the new facility for producing stable fire whirls was fully validated. Some potential applications of the new facility were discussed in detail. Especially, instruments such as infrared camera can be used to investigate the flame radiation of fire whirls by the new facility.