池火灾下立式油罐喷淋冷却数值模拟研究
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摘要
从燃烧速率、火焰高度和火焰温度、热辐射通量三个方面详细论述了池火灾模型,并通过实验、计算和模拟进行对比研究。建立小型立式油罐模型,模拟得到罐壁温度的最大值在750 K左右,火焰温度在1 200 K以上,与试验值吻合。对罐壁进行喷淋冷却,根据规范进行合适布置,选取不同的水喷淋流量,得到罐壁温度增速随着喷淋强度的增大而减缓,12 L/(min·m~2)左右已可满足冷却需求的结果。
In this article the pool fire model is particularly discussed in aspects of the burning rate,flame height and flame temperature and thermal radiation flux,and also it is compared and studied through the experiment,calculation,and simulation. Based on the establishment of small size vertical tank model,it is simulated and found out that the maximum value of tank wall temperature is 750 K and the flame temperature is above 1 200 K,in conformity with the experimental value. Through spray cooling for the tank wall,reasonable layout according to the rule and different selection of water spray flow rate,it is found that the wall temperature increases slowly with the increase of the strength of spray and when to 12 L /( min·m~2) or so,it can meet the requirements of cooling.
In this article the pool fire model is particularly discussed in aspects of the burning rate,flame height and flame temperature and thermal radiation flux,and also it is compared and studied through the experiment,calculation,and simulation. Based on the establishment of small size vertical tank model,it is simulated and found out that the maximum value of tank wall temperature is 750 K and the flame temperature is above 1 200 K,in conformity with the experimental value. Through spray cooling for the tank wall,reasonable layout according to the rule and different selection of water spray flow rate,it is found that the wall temperature increases slowly with the increase of the strength of spray and when to 12 L /( min·m~2) or so,it can meet the requirements of cooling.
引文
[1]万象明.冷却对油罐火灾燃烧特性的影响研究[D].天津:天津商业大学,2011.
[2]苏琳,王丽晶,王志辉,等.自由燃烧下油池火灾的燃烧特性研究[J].消防科学与技术,2011(8):668-670.
[3]邢志祥.火灾环境下液化气储罐热响应动力过程的研究[D].南京:南京工业大学,2004.
[4]许贵贤.汽油储罐事故后果分析[J].工业安全与环保,2009,35(10):38-40.
[5]KOSEKI H,HAYASAKA H.Estimation of thermal balance in heptane pool fire[J].Journal of Fire Science,1989,7(4):237-250.
[6]HOTTEL H C.Certain laws governing diffusive burning of liquids[J].Fire Research Abstracts and Reviews,1959(1),41-44.
[7]杨君涛.油罐火灾的数值模拟与实验研究[D].天津:天津大学,2005.
[8]李建华,黄郑华.油罐火灾沸溢喷溅的控制措施[J].油气储运,2006,25(12):46-48.
[2]苏琳,王丽晶,王志辉,等.自由燃烧下油池火灾的燃烧特性研究[J].消防科学与技术,2011(8):668-670.
[3]邢志祥.火灾环境下液化气储罐热响应动力过程的研究[D].南京:南京工业大学,2004.
[4]许贵贤.汽油储罐事故后果分析[J].工业安全与环保,2009,35(10):38-40.
[5]KOSEKI H,HAYASAKA H.Estimation of thermal balance in heptane pool fire[J].Journal of Fire Science,1989,7(4):237-250.
[6]HOTTEL H C.Certain laws governing diffusive burning of liquids[J].Fire Research Abstracts and Reviews,1959(1),41-44.
[7]杨君涛.油罐火灾的数值模拟与实验研究[D].天津:天津大学,2005.
[8]李建华,黄郑华.油罐火灾沸溢喷溅的控制措施[J].油气储运,2006,25(12):46-48.