不同形状受限空间内油气爆燃特性的实验研究
发布时间：2018-11-01 19:04
【摘要】：基于实验对4个不同形状的20L容器内的油气爆燃过程进行了研究,探讨了不同形状受限空间内爆炸压力荷载的变化和火焰行为的区别。结果表明:管道(短管和长管)的压力时序曲线较容积式受限空间(球形容器和立方体容器)的压力时序曲线更复杂,并且出现压力振荡;随着初始浓度的增加,超压值和平均升压速率均先增大后减小,在浓度为1.74%时达到最大值,此时,超压从大到小依次为:长管短管立方体球形容器,平均升压速率从大到小依次为:短管立方体长管球形容器;在爆燃初期,立方体中火焰行为为半球状层流火焰→扁平层流火焰,火焰速度先增大后减小,最大速度为12.5 m/s,长管中火焰行为为半球状层流火焰→拉伸指状火焰,火焰速度一直增大,最大速度为40 m/s。
[Abstract]:Based on the experiments, the hydrocarbon deflagration process in four 20L vessels with different shapes was studied, and the variation of explosion pressure load and the difference of flame behavior in confined space with different shapes were discussed. The results show that the pressure time series curve of pipeline (short pipe and long tube) is more complex than that of volume confined space (spherical vessel and cube vessel), and there is pressure oscillation. With the increase of initial concentration, the value of overpressure and the average rate of pressure rise first and then decrease, reaching the maximum when the concentration is 1.74. In this case, the order of overpressure from large to small is: long tube short tube cube spherical vessel, The order of the average pressure rise rate from big to small is: short tube cube long tube spherical vessel; In the early stage of deflagration, the flame behavior in the cube is a hemispherical laminar flame and a flat laminar flame. The flame velocity increases first and then decreases, and the maximum velocity is 12.5 ms.The flame behavior in the long tube is a hemispherical laminar flame stretching finger flame. The flame speed has been increasing, with a maximum velocity of 40 m / s.
【作者单位】： 中国人民解放军后勤工程学院军事供油工程系;
【基金】：国家自然科学基金项目(51276195)
【分类号】：O643.2;TE88
本文编号：2304828
[Abstract]:Based on the experiments, the hydrocarbon deflagration process in four 20L vessels with different shapes was studied, and the variation of explosion pressure load and the difference of flame behavior in confined space with different shapes were discussed. The results show that the pressure time series curve of pipeline (short pipe and long tube) is more complex than that of volume confined space (spherical vessel and cube vessel), and there is pressure oscillation. With the increase of initial concentration, the value of overpressure and the average rate of pressure rise first and then decrease, reaching the maximum when the concentration is 1.74. In this case, the order of overpressure from large to small is: long tube short tube cube spherical vessel, The order of the average pressure rise rate from big to small is: short tube cube long tube spherical vessel; In the early stage of deflagration, the flame behavior in the cube is a hemispherical laminar flame and a flat laminar flame. The flame velocity increases first and then decreases, and the maximum velocity is 12.5 ms.The flame behavior in the long tube is a hemispherical laminar flame stretching finger flame. The flame speed has been increasing, with a maximum velocity of 40 m / s.
【作者单位】： 中国人民解放军后勤工程学院军事供油工程系;
【基金】：国家自然科学基金项目(51276195)
【分类号】：O643.2;TE88
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