Experimental Study of Combustion Characteristics of Circular Ring Thin-Layer Pool Fire

被引:17
作者
Sun, Hao [1 ]
Wang, Changjian [1 ]
Liu, Haoran [1 ]
Li, Manhou [1 ]
Zhang, Aifeng [1 ]
Zhao, Weiping [1 ]
Gao, Caibin [1 ]
机构
[1] Hefei Univ Technol, Sch Civil Engn, Hefei 230009, Anhui, Peoples R China
关键词
REDUCED PRESSURE ATMOSPHERE; BURNING RATE; TEMPERATURE PROFILE; THERMAL-RADIATION; FLAME HEIGHT; FUEL SURFACE; HEPTANE; FEEDBACK; PLUMES; ARRAYS;
D O I
10.1021/acs.energyfuels.7b01504
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
For clarifying the combustion behavior of a circular ring thin-layer pool fire, a series of experiments with varying pool diameters were carried out. The equivalent pool area of 0.071 m(2) and an initial n-heptane thickness of 10 mm were fixed. An electronic balance, a digital camera, and K-type thermocouples were used to measure burning rate, flame height, and centerline temperature, respectively. The results show that more burning stages can appear with the increase of the inner and outer diameters of the circular ring pool. Fire merging can occur at any one of the stages of initial growth, quasi-steady burning with surface boiling, transition to bulk boiling, and bulk boiling burning; moreover, the maximum burning rate of fire merging is about 3.5 times that of the ordinary pool fire with the same area. The core hollow region plays an important role in decreasing the burning rate, flame height, fire merging time, etc. The evolutions of the characteristic parameters, e.g., burning rate, flame height, and centerline temperature, were analyzed. New correlations for predicting these parameters were also proposed.
引用
收藏
页码:10082 / 10092
页数:11
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