摘要
为分析充气薄膜对开敞空间中可燃气体爆炸试验结果的影响,该文基于10 m半径的半球形氢气/空气混合气体的爆燃试验,采用AutoReaGas分析软件,建立精细化有限体积分析模型。计算结果与试验结果的对比分析表明,该文建立的有限体积模型能够较为真实地反映充气薄膜对气体爆燃过程的影响;试验中薄膜的破裂超压约为0.5 k Pa^3 k Pa。进一步分析了充气薄膜对1 m^3、8 m^3、125 m^3和1000 m^3的氢气/空气、乙炔/空气和甲烷/空气混合气体爆燃超压的影响。结果表明,充气薄膜对爆燃超压的影响随着气体体积、燃烧速度和传播距离的增加而减弱,并据此给出了不同气体爆炸试验中充气薄膜选择的建议。
In order to analyze the influence of the film on the test results of the unconfined gas deflagration, a refined finite volume model was built up based on the deflagration test with hydrogen-air mixture of 10 m radius by use of the computational fluid dynamic software AutoReaGas. The comparison between the numerical results and the test data shows that, the model is able to predict the influence of the film on the gas deflagration, and the ruptured overpressure of the film in the test is about 0.5 kPa～3 kPa. Furthermore, the influence of the film on the deflagration overpressure of the hydrogen-air, acetylene-air and methane-air mixtures with the volumes of 1 m^3, 8 m^3, 125 m^3 and 1000 m^3 were analyzed by AutoReaGas. It is shown that the influence of the film on the deflagration overpressure decreases with the increasing of the gas volume, burning velocity and distance. The suggestion on the choice of the film in the gas explosion tests was also given.
出处
《工程力学》
EI
CSCD
北大核心
2017年第7期232-240,共9页
Engineering Mechanics
基金
国家重点基础研究发展973计划项目(2015CB058001)
国家自然科学基金创新研究群体科学基金项目(51321064)
国家自然科学基金青年项目(51408608)
