湍流状态下氢气爆炸极限的试验研究
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摘要
为研究氢气在流动状态下的爆炸特性,运用FRTA爆炸极限测试仪测试了不同湍流强度下氢气的爆炸极限。通过调节容器内搅拌子的转速表征不同的湍流强度,并运用二维旋涡模型分析氢气的爆炸极限与湍流强度的关系,得出爆炸上限、爆炸下限与湍流强度的拟合关系式。结果表明:宏观静止状态下氢气的爆炸极限为4.59%~73.67%;当搅拌子转速从0 rad/min增大到1 200 rad/min时,氢气的爆炸下限上升到5.011%,爆炸上限下降到72.402%。湍流强度增加时,氢气的爆炸下限升高,爆炸上限下降,爆炸范围变窄。
In order to study the explosion characteristics of hydrogen in the flow state, the explosion limit of hydrogen under different turbulence intensity was tested by FRTA explosion limit tester. The turbulence intensity was characterized by adjusting the rotational speed of the stirrer in the container and analyzed by twodimensional vortex model to get the relationship between the explosion limit of hydrogen and the turbulence intensity. The fitting equations of upper explosion limit or lower explosion limit with turbulence intensity were obtained. The results indicated that: the hydrogen explosion range is 4.59% ~73.67% in the macroscopic stationary state. When the stir speed increases from 0 rad/min to 1 200 rad/min, the upper explosion limit of hydrogen declines to 5.011%, the lower explosion limit of hydrogen reaches 72.402%. It is concluded that when the turbulence intensity increases, the hydrogen lower explosion limit hydrogen increases, the upper explosion limit declines and the explosion range becomes narrower.
In order to study the explosion characteristics of hydrogen in the flow state, the explosion limit of hydrogen under different turbulence intensity was tested by FRTA explosion limit tester. The turbulence intensity was characterized by adjusting the rotational speed of the stirrer in the container and analyzed by twodimensional vortex model to get the relationship between the explosion limit of hydrogen and the turbulence intensity. The fitting equations of upper explosion limit or lower explosion limit with turbulence intensity were obtained. The results indicated that: the hydrogen explosion range is 4.59% ~73.67% in the macroscopic stationary state. When the stir speed increases from 0 rad/min to 1 200 rad/min, the upper explosion limit of hydrogen declines to 5.011%, the lower explosion limit of hydrogen reaches 72.402%. It is concluded that when the turbulence intensity increases, the hydrogen lower explosion limit hydrogen increases, the upper explosion limit declines and the explosion range becomes narrower.
引文
[1]暴秀超,刘福水.氢气/空气混合气层流燃烧速度的实验测量与模拟计算[J].燃烧科学与技术,2011,17(5):407-413.
[2]CHIPPETT S.Modeling of vented deflagration[J].Combustion and Flame,1984,55(2):127-140.
[3]FAIRWEATHER M,HARGRAVE G K,IBRAHIM S S,et al.Studies of premixed flame propagation in explosion tubes[J].Combustion and Flame,1999,116(4):504-518.
[4]王华,葛岭梅,邓军,等.受限空间可燃性气体爆炸特性的对比[J].煤炭学报,2009,34(2):218-223.
[5]谢溢月,谭迎新,孙彦龙.湍流状态下甲烷爆炸极限的测试研究[J].中国安全科学学报,2016,26(11):65-69.
[6]郝建斌.燃烧与爆炸学[M].北京:中国石化出版社,2002.
[7]张兆顺,崔桂香.流体力学[M].北京:清华大学出版社,2015.
[8]GB/T 12474-2008,空气中可燃气体爆炸极限测定方法[S].
[9]谭迎新,张景林,张小春.可燃气体(或蒸汽)爆炸特性参数测定[J].兵工学报,1995,(2):56-60.
[10]姬威威,苏磊,郭子东,等.温度压力耦合下甲烷爆炸极限变化规律研究[J].消防科学与技术,2017,36(3):305-308.
[2]CHIPPETT S.Modeling of vented deflagration[J].Combustion and Flame,1984,55(2):127-140.
[3]FAIRWEATHER M,HARGRAVE G K,IBRAHIM S S,et al.Studies of premixed flame propagation in explosion tubes[J].Combustion and Flame,1999,116(4):504-518.
[4]王华,葛岭梅,邓军,等.受限空间可燃性气体爆炸特性的对比[J].煤炭学报,2009,34(2):218-223.
[5]谢溢月,谭迎新,孙彦龙.湍流状态下甲烷爆炸极限的测试研究[J].中国安全科学学报,2016,26(11):65-69.
[6]郝建斌.燃烧与爆炸学[M].北京:中国石化出版社,2002.
[7]张兆顺,崔桂香.流体力学[M].北京:清华大学出版社,2015.
[8]GB/T 12474-2008,空气中可燃气体爆炸极限测定方法[S].
[9]谭迎新,张景林,张小春.可燃气体(或蒸汽)爆炸特性参数测定[J].兵工学报,1995,(2):56-60.
[10]姬威威,苏磊,郭子东,等.温度压力耦合下甲烷爆炸极限变化规律研究[J].消防科学与技术,2017,36(3):305-308.