狭长空间内通风对航空煤油池火燃烧速率的影响  

Effects of ventilation on the burning rate of aviation kerosene pool fire in long-narrow space

作　　者：倪佳迪[1] 李权威[1] 李森[1] 秦俊[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230027

出　　处：《安全与环境学报》2010年第6期155-159,共5页Journal of Safety and Environment

摘　　要：在风速0～2.3m/s、5.6 m×0.8 m×0.8 m的低湍流狭长风洞内对边长3～9 cm的正方形航空煤油池火进行燃烧试验,结合FDS数值模拟,研究了狭长空间内通风和油盘尺寸对正方形航空煤油池火燃烧速率的影响,并做出相应的分析。结果表明,数值模拟结果和试验结果吻合得较好。航空煤油的燃烧速率随风速的增大而升高,且油盘下风侧壁面对燃料的导热加强是促进燃烧的主要因素。随着油盘尺寸的增大,油池获得的热反馈增强,航空煤油燃烧加剧。This paper is aimed to study the effects of ventilation and pool size on the burning rate of square aviation kerosene pool fire in long-narrow space such as tunnel, subway and so on. The following works have been done： First, square aviation kerosene pool fire with the lengths of 3 cm, 4 era, 5 era, 6 era, 7 cm, 8 cm and 9 cm were burned in a long-narrow and low turbulence wind tunnel with dimensions of 5.6 m × 0.8 m × 0.8 m, which can provide adjustable wind speed of 0- 2.3 m/s. The numerical simulations were performed by using Fire Dynamics Simulation （FDS） . According to our analysis of the related data from experiments and numerical simulations, we find that numerical and experimental results agree well with each other. We have made a detailed discussion as well on the influence of ventilation on the burning rate of square aviation kerosene pool fire. We find that the burning rate of small-scale square aviation kerosene pool fire whose side length in the range of 3 cm to 9 cm can be accelerated by air flow. It can be said that the burning rate of aviation fuel pool fire monotonically increases with the air flow speed, and it plays a dominant role for the thermal conduction between the leeward wall of oil pan and the fuel. Moreover, the results indicate that under the wind velocity of 0 - 2.3 m/s, the burning rate of aviation kerosene pool fire with the side length of 3 cm to 9 cm arises with the increase of pool size. The phenomenon above is caused by the enhancement of heat feedback obtained by the aviation kerosene pool fire.

关 键 词：安全工程 燃烧速率 航空煤油池火 风 油盘尺寸 

分 类 号：X9[环境科学与工程—安全科学] X4