Transient supersonic release of hydrogen from a high pressure vessel: A computational analysis
Transient supersonic release of hydrogen from a high pressure vessel: A computational analysis
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DOI：
10.1016/j.ijhydene.2009.05.090
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发表时间：
2009-07
影响因子：
7.2
通讯作者：
F. Péneau;G. Pedro;P. Oshkai;P. Bénard;N. Djilali
中科院分区：
文献类型：
--
作者：
F. Péneau;G. Pedro;P. Oshkai;P. Bénard;N. Djilali
了解在容器破裂或排气期间从压缩容器中排出的氢气射流的特性对于确定氢气分配和使用的安全要求至关重要。这种射流在排气期间可以经历几种流动状态，从初始超音速流动到跨音速流动，再到随着容器中的压力降低的亚音速流动状态。弓形激波是射流发展初始阶段的一种特征流动结构，本文着重研究了弓形激波的发展及其后面的射流结构，采用非定常可压缩流动模拟方法研究了脉冲射流的瞬态行为。氢气射流进入静止的氢气和氢气射流进入空气的情况下。气体被认为是理想的，和计算域是轴对称的。的射流结构，包括冲击波和流动分离，由于在喷嘴处的逆压梯度的研究重点是单组分和多组分流动的情况之间的差异。
Understanding the characteristics of a hydrogen gas jet exiting from a compressed vessel during vessel rupture or venting is crucial for determining safety requirements for distribution and use of hydrogen. Such jets can undergo several flow regimes during venting, from initial supersonic flow, to transonic, to subsonic flow regimes as the pressure in the vessel decreases. A bow shock wave is a characteristic flow structure during the initial stage of the jet development, and this paper focuses on the development of the bow shock wave and the jet structure behind it. The transient behaviour of an impulsively initiated jet is investigated using unsteady, compressible flow simulations. Both the cases of a hydrogen jet exiting into quiescent hydrogen and of a hydrogen jet exiting into air are presented. The gases are considered to be ideal, and the computational domain is axisymmetric. The jet structure, including the shock wave and flow separation due to an adverse pressure gradient at the nozzle is investigated with a focus on the differences between the single- and multi-component flow scenarios.