摘要
为研究数值模拟边界条件的准确性及泄爆门对瓦斯爆炸的抑制作用,自制大直径爆炸管道试验装置,在瓦斯体积分数9.5%条件下进行瓦斯爆炸试验,同时运用FLUENT软件模拟整个爆炸传播过程,通过对比分析试验数据与模拟结果,分析其变化特征和泄爆效果。结果表明:爆炸冲击波从测点2传播到测点3时,试验和数值模拟方式下压力峰值衰减率分别为51.40%和51.28%,偏差率为0.23%,泄爆门能显著衰减爆炸压力;2种研究方式下温度变化规律相同,测点2、3温度峰值偏差分别为6.99%和6.43%,但泄爆门对火焰温度没有抑制作用;通过对比研究发现,两者得出的结论和变化规律吻合,证实了数值模拟的数学模型、边界条件和初始条件的准确性。
In order to study accuracy of numerical simulation boundary conditions and explosion venting doors’inhibitory effect on gas explosion,tests were carried out at a gas concentration of 9.5%by using independently developed large-diameter explosion pipeline device.Then,explosion propagation process was simulated with FLUENT software,and experimental data and simulation results were compared to analyze change characteristics and flameproof effect.The results show that when explosion shock wave propagates from measuring point 2 to point 3,pressure peak decay rates of test and numerical simulation are 51.40%and 51.28%respectively with a deviation rate of 0.23%,which shows that venting door can significantly attenuate explosion pressure.Temperature changes in the same law for both methods,and peak value deviations of measuring points 2 and 3 are 6.99%and 6.43%,but explosion venting door does not control flame temperature.Through comparative study,it is found that conclusions and change laws of two methods are consistent,which confirms accuracy of mathematical model,boundary conditions and initial conditions of numerical simulation.
作者
李昂
司俊鸿
李雪冰
LI Ang;SI Junhong;LI Xuebing(School of Emergenay Technology and Management,North China Institute of Science and Technology,Beijing 101601,China;Hebei Provincial Key Lab of Mine Disaster Prevention and Control,Langfang Hebei 065201,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第8期51-56,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51804120,51804117)
中央高校基本科研业务费资助(3142019006,3142018028)
廊坊市科技计划项目(2020013031)。
关键词
泄爆门
瓦斯爆炸
大尺寸管道
爆炸压力
数值模拟
explosion venting door
gas explosion
large-size pipeline
explosion pressure
numerical simulation
