Jet fires: An experimental study of the main geometrical features of the flame in subsonic and sonic regimes
Jet fires: An experimental study of the main geometrical features of the flame in subsonic and sonic regimes
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DOI：
10.1002/aic.11653
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发表时间：
2009
期刊：
影响因子：
3.7
通讯作者：
A. Palacios;M. Muñoz;J. Casal
中科院分区：
文献类型：
--
作者：
A. Palacios;M. Muñoz;J. Casal
虽然飞机火灾通常比其他火灾规模小，但它们可能导致一系列破坏性事件，从而增加事故的规模。因此，应该预测它们的大小，以便进行准确的风险评估。在文献中，大多数估计射流火灾尺寸的建议都涉及小型射流火灾（长度达2.5米）或亚音速火焰。在本研究中，在静止空气中进行了相对较大的丙烷喷射火灾实验。使用6种不同的出口直径，获得了长度达10 m的垂直湍流扩散火焰，具有声速和亚音速质量流量。实验用摄像机和热成像仪拍摄，所得可见光和红外图像用于确定火焰长度和起飞距离。本文还提出了射流长度作为几个变量（质量流量、孔口出口直径、弗劳德数和雷诺数）的函数的估计表达式。2008化学工程学报，35 (5):556 - 563,2009
Although jet fires are usually smaller than other fires, they may lead to a destructive chain of events that can increase the scale of an accident. Therefore, their size should be predicted for accurate risk assessment. In the literature, most of the proposals for estimating jet fire size concern small jet fires (up to 2.5 m in length) or subsonic flames. In this study, experiments on relatively large propane jet fires in still air were performed. Vertical turbulent diffusion flames up to 10 m in length, with sonic and subsonic mass flow rates, were obtained using six different orifice exit diameters. The experiments were filmed with video and thermographic cameras and the resulting visible and infrared images were used to determine flame length and lift-off distance. Expressions for estimating jet length as a function of several variables (mass flow rate, orifice exit diameter, Froude and Reynolds numbers) are also proposed. 2008 American Institute of Chemical Engineers AIChE J, 55: 256–263, 2009