基于SIMTEC最佳甲烷当量比下的爆炸数值模拟
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摘要
为研究瓦斯爆炸压力、温度以及浓度场变化规律,利用SIMTEC软件模拟了三步化学反应过程的瓦斯爆炸,实现了在近球体密闭容器中对最佳甲烷当量比下的预混爆炸过程的模拟。结果表明:爆炸超压、温度先增加后减小,温度呈脉冲状震荡缓慢下降;压力、温度峰值时间与产物质量浓度峰值时间一致,爆炸反应越完全,产物质量浓度越大。
In order to study the variation law of gas explosion pressure, temperature and concentration field, the gas explosion in three-step chemical reaction process was simulated by SIMTEC software that achieved the numerical simulation on the premixed explosion process under the optimal methane equivalent ratio in a nearly spherical closed vessel. The results showed that the temperature firstly increased and then slowly decreased with a form of pulse shaped oscillation when the exploration overpressure; when the time of pressure and temperature peak value and the time of product mass concentration peak value was consistent, the exploration reaction could be more complete and the product mass concentration could be higher.
In order to study the variation law of gas explosion pressure, temperature and concentration field, the gas explosion in three-step chemical reaction process was simulated by SIMTEC software that achieved the numerical simulation on the premixed explosion process under the optimal methane equivalent ratio in a nearly spherical closed vessel. The results showed that the temperature firstly increased and then slowly decreased with a form of pulse shaped oscillation when the exploration overpressure; when the time of pressure and temperature peak value and the time of product mass concentration peak value was consistent, the exploration reaction could be more complete and the product mass concentration could be higher.
引文
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[2] 林柏泉,桂晓宏.瓦斯爆炸过程中火焰传播规律的模拟研究[J].中国矿业大学学报,2002(1)
[3] 罗艾民,李万春,吴宗之等.扁平圆环局限空间蒸气云爆炸数值模拟及其在事故调查中的应用[J].中国安全科学学报,2008(1)
[4] 罗振敏.基于FLACS的受限空间瓦斯爆炸数值模拟[J].煤炭学报,2013(8)
[5] 王志荣,蒋军成,郑杨艳.连通容器气体爆炸流场的CFD模拟[J].化工学报,2007(4)
[6] 张玉洲.大涡模拟和低雷诺数k-ε模型对浮升流的数值研究[D].杭州:杭州电子科技大学,2018
[7] Smagorinsky J.General circulation experiments with the primitive equations [J].Monthly Weather Review,1963(3)
[8] C.K.Westbrook,Frederick.L.Dryer.Simpli?ed Reaction Mechanisms for the Oxidation of Hydrocarbon Fuel Inflames[J].Combustion Science and Technology,1981(11)
[9] 尉存娟.水平管道内甲烷—空气预混气体爆炸过程研究[D].中北大学,2010
[10] 王志荣.受限空间气体爆炸传播及其动力学过程研究[D].南京:南京工业大学,2005
[11] 陈晓坤,张自军,王秋红等.20 L近球形容器中微米级铝粉的爆炸特性[J].爆炸与冲击,2018(5)
[12] 李润之.点火能量与初始压力对瓦斯爆炸特性的影响研究[D].山东科技大学,2010