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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Propane-air pipe explosion experiments. Data for estimation of 1-D burning velocity in slow regimes
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Propane-air pipe explosion experiments. Data for estimation of 1-D burning velocity in slow regimes

机译：丙烷-空气管道爆炸实验。慢速状态下一维燃烧速度的估算数据

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摘要

Flame propagation in circular steel pipes with inner diameter of 22 mm and lengths of 1, 2 and 5 in has been studied experimentally. The combustible gas mixtures used were propane-air mixtures at various equivalence ratios, which sustain flame propagation in a slow regime in this pipe geometry. The results obtained are in agreement with comparable reported experiments. Initial flame propagation is governed by the laminar flame velocity, but the flame propagation in a slow regime will depend strongly on the acoustic oscillations in the pipe from the time when the first rarefaction wave, which was reflected at the pipe outlet, reaches the flame front. The main purpose of performing the experiments was to obtain a set of data for the numerical simulations. A quasi I-D burning velocity is determined numerically with a Matlab version of the random choice method (RCMLAB) on the basis of the experimental pressure records. This estimated burning velocity is used as input to the combustion model in the RCMLAB code. It seems to be good agreement between the numerical results and experiments, except for some variance probably caused by the pipe outlet. The expansion at the pipe outlet is important for the acoustic oscillations and our results show the importance of the modelling of the outlet. (C) 2004 Elsevier Inc. All rights reserved.
机译：实验研究了内径为22 mm，长度为1、2和5 in的圆形钢管中的火焰传播。所使用的可燃气体混合物是各种当量比的丙烷-空气混合物，它们在这种管道几何形状中以缓慢的方式维持火焰传播。获得的结果与可比较的报道实验一致。初始火焰传播是由层流火焰速度控制的，但是在慢速状态下的火焰传播将强烈依赖于从管道出口处反射的第一稀疏波到达火焰前沿开始的管道中的声波振荡。 。进行实验的主要目的是获得一组用于数值模拟的数据。使用Matlab版本的随机选择方法（RCMLAB），根据实验压力记录，以数值方式确定准I-D燃烧速度。该估计的燃烧速度在RCMLAB代码中用作燃烧模型的输入。数值结果和实验似乎很好地吻合，除了可能由管道出口引起的一些差异。管道出口处的膨胀对于声波振荡很重要，我们的结果表明了出口建模的重要性。 （C）2004 Elsevier Inc.保留所有权利。

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