油气爆炸在细长密闭管道内的振荡传播特性
发布时间：2018-07-25 08:25
【摘要】：针对细长密闭管道内汽油蒸气-空气混合气爆炸的振荡传播特性进行实验。研究表明:细长密闭管道内的油气爆炸分为振荡和非振荡两种爆炸模式;振荡爆炸超压呈现出锯齿状振荡特征,其超压增长期由4个阶段组成:第1阶段无明显的压力上升;第2阶段的高压力上升速率与快速的火焰有关;第3阶段的超压振幅以抛物线形式增长,此阶段是否有压力振荡与油气浓度、管道长径比有关,第3阶段的振荡周期随时间减小,振荡周期与火焰锋面前方的未燃区长度有关;第4阶段的超压振幅以指数形式增长,振荡周期趋于稳定并随管道长度的增加呈线性关系增加,振荡周期受到油气浓度的影响;振荡爆炸只在一定油气浓度范围内发生,且振荡爆炸的发生与油气浓度、管道长径比有关;振荡爆炸极限范围及其在油气的爆炸极限内所占比例均随管道长径比的增加而增大。
[Abstract]:The oscillatory propagation characteristics of gasoline vapor-air mixture explosion in a slender closed pipe were investigated. The results show that the oil and gas explosion in the slender closed pipeline can be divided into oscillating and non-oscillating modes, and the oscillatory explosion overpressure shows the characteristic of sawtooth oscillation, and its overpressure growth period is composed of four stages: in the first stage, there is no obvious pressure rise; The high pressure rise rate in the second stage is related to the rapid flame, the overpressure amplitude in the third stage increases in the form of parabola, and whether there is pressure oscillation in this stage is related to the oil and gas concentration and the ratio of length to diameter of the pipeline. The oscillation period of the third stage decreases with time, and the oscillation period is related to the length of the unburned zone in front of the flame front, and the amplitude of overpressure in the fourth stage increases exponentially, and the oscillation period tends to stabilize and increases linearly with the increase of pipeline length. The oscillation period is affected by the oil and gas concentration, the oscillatory explosion only occurs in a certain range of oil and gas concentration, and the oscillation explosion is related to the oil and gas concentration and the ratio of length to diameter of the pipeline. The limit range of oscillatory explosion and its proportion in the explosion limit of oil and gas increase with the increase of the ratio of length to diameter of pipeline.
【作者单位】： 后勤工程学院供油系;
【基金】：国家自然科学基金(51276195)
【分类号】：TE88
本文编号：2143215
[Abstract]:The oscillatory propagation characteristics of gasoline vapor-air mixture explosion in a slender closed pipe were investigated. The results show that the oil and gas explosion in the slender closed pipeline can be divided into oscillating and non-oscillating modes, and the oscillatory explosion overpressure shows the characteristic of sawtooth oscillation, and its overpressure growth period is composed of four stages: in the first stage, there is no obvious pressure rise; The high pressure rise rate in the second stage is related to the rapid flame, the overpressure amplitude in the third stage increases in the form of parabola, and whether there is pressure oscillation in this stage is related to the oil and gas concentration and the ratio of length to diameter of the pipeline. The oscillation period of the third stage decreases with time, and the oscillation period is related to the length of the unburned zone in front of the flame front, and the amplitude of overpressure in the fourth stage increases exponentially, and the oscillation period tends to stabilize and increases linearly with the increase of pipeline length. The oscillation period is affected by the oil and gas concentration, the oscillatory explosion only occurs in a certain range of oil and gas concentration, and the oscillation explosion is related to the oil and gas concentration and the ratio of length to diameter of the pipeline. The limit range of oscillatory explosion and its proportion in the explosion limit of oil and gas increase with the increase of the ratio of length to diameter of pipeline.
【作者单位】： 后勤工程学院供油系;
【基金】：国家自然科学基金(51276195)
【分类号】：TE88
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1 田新利;岳忠;;液化石油气钢瓶长径比研究[J];中国安全科学学报;2007年12期
2 葛兆龙;卢义玉;左伟芹;夏彬伟;赵艳萍;汤积仁;;水力喷砂射孔喷嘴的数值模拟及试验研究[J];郑州大学学报(工学版);2011年03期
，本文编号：2143215
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