Flame propagation of premixed liquefied petroleum gas explosion in a tube
Flame propagation of premixed liquefied petroleum gas explosion in a tube
复制标题
预混液化石油气在管内爆炸的火焰传播
DOI：
10.1016/j.applthermaleng.2016.11.040
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发表时间：
2017-02-25
影响因子：
6.4
通讯作者：
Chow, W. K.
中科院分区：
文献类型：
--
作者：
Huo, Y.;Chow, W. K.
在直径2.6m、长25m的管内对预混液化石油气(LPG)爆炸过程中的火焰传播进行了实验研究。然后将爆炸管分成两个不同比例的LPG和空气混合区域。使用聚氯乙烯(PVC)薄膜薄片来调整每个区域的长度。共进行了3个单区实验和5个双区实验。利用实验结果和理论分析，对管道内的爆炸现象和火焰传播进行了解析研究。提出了一个简单的火焰传播模型，并利用本研究的实验数据和一些文献结果进行了验证。结果表明，在距离管子一定距离内，对于浓度均匀的燃料，火焰传播特性具有随时间呈指数函数变化的总体趋势。爆破点的火焰传播速度取决于湍流燃烧速度和膨胀率。当燃料浓度变化较大时，实验数据与经验指数函数的偏差较大。(C)2016爱思唯尔有限公司。保留所有权利。
Flame propagation in premixed liquefied petroleum gas (LPG) explosion was studied experimentally in a tube of diameter 2.6 m and length 25 m. Experiments on LPG explosion were conducted in a single zone first in this large explosion tube. The explosion tube was then divided into two zones with different mixing ratios of LPG and air. A thin polyvinyl chloride (PVC) film sheet was used to adjust the length of each zone. A total of three single-zone experiments and five two-zone experiments were carried out. Explosion phenomena and flame propagation in the tube were studied analytically using experimental results and theoretical analysis. A simple model for the flame propagation was proposed and tested using the experimental data in the present study and some literature results. Flame propagation characteristics were found with a general trend to vary with time as an exponential function for adequate fuel with uniform concentrations within a certain distance of the tube. The flame propagation speed at a point in explosion depends on the turbulent burning speed and expansion ratio. Experimental data deviated more from the empirical exponential function for larger variations of fuel concentrations. (C) 2016 Elsevier Ltd. All rights reserved.