Mechanisms of high-pressure hydrogen gas self-ignition in tubes
Mechanisms of high-pressure hydrogen gas self-ignition in tubes
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DOI：
10.1016/j.jlp.2007.06.012
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发表时间：
2008-03-01
影响因子：
3.5
通讯作者：
Volodin, V. V.
中科院分区：
文献类型：
--
作者：
Golub, V. V.;Baklanov, D. I.;Volodin, V. V.
本文描述了一个数值和实验研究的氢自燃发生的结果形成的冲击波。激波是在管内高压氢气的前方形成的。氢气-空气混合物的点燃发生在氢气和氧化剂混合物的接触表面处，并且是由于作为冲击波的结果而产生的温度升高。自燃的必要条件是保持混合物中的高温足够长的时间以使燃烧发生。所采用的实验技术是基于用氢气加压的高压室，达到爆破盘操作以将加压的氢气排放到含有空气的圆柱形或矩形横截面的管中的点。一个物理化学模型，包括气体动力学传输的粘性气体，氢氧化和热交换的层流方法的详细动力学用于计算高压氢自燃。找到了在空气中形成足够强度的冲击波使氢-空气混合物自燃时的贮箱压力范围。基于初始条件的实验和数值结果分析了控制物理现象（容器内的氢气压力，以及氢气排放管的形状）和导致燃烧的物理机制。(C)2007爱思唯尔有限公司版权所有。
This paper describes a numerical and experimental investigation of hydrogen self-ignition occurring as a result of the formation of a shock wave. The shock wave is formed in front of high-pressure hydrogen gas propagating in a tube. The ignition of the hydrogen-air mixture occurs at the contact surface of the hydrogen and oxidant mixture and is due to the temperature increase produced as a result of the shock wave. The required condition for self-ignition is to maintain the high temperature in the mixture for a time long enough for inflammation to take place. The experimental technique employed was based on a high-pressure chamber pressurized with hydrogen, to the point of a burst disk operating to discharge pressurized hydrogen into a tube of cylindrical or rectangular cross section containing air. A physicochemical model involving gas-dynamic transport of a viscous gas, detailed kinetics of hydrogen oxidation and heat exchange in the laminar approach was used for calculations of high-pressure hydrogen self-ignition. The reservoir pressure range, when a shock wave is formed in the air that has sufficient intensity to produce self-ignition of the hydrogen-air mixture, is found. An analysis of governing physical phenomena based on the experimental and numerical results of the initial conditions (the hydrogen pressure inside the vessel, and the shape of the tube in which the hydrogen was discharged) and physical mechanisms that lead to combustion is presented. (C) 2007 Elsevier Ltd. All rights reserved.