Experimental study on flow characteristics and spontaneous ignition produced by pressurized hydrogen release through an Omega-shaped tube into atmosphere
Experimental study on flow characteristics and spontaneous ignition produced by pressurized hydrogen release through an Omega-shaped tube into atmosphere
复制标题
加压氢气经Omega形管释放到大气中的流动特性及自燃实验研究
DOI：
10.1016/j.fuel.2016.07.078
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发表时间：
2016
期刊：
影响因子：
7.4
通讯作者：
Sun Jinhua
中科院分区：
文献类型：
--
作者：
Gong Liang;Duan Qiangling;Jiang Lin;Jin Kaiqiang;Sun Jinhua
对加压放氢通过欧米茄形管进入大气时的流动特性和自燃进行了实验研究。本文旨在研究下游管的几何形状对加压放氢的激波和自燃的影响。本实验中使用的管子是欧米茄形状的管子。研究发现，由于压电式压力传感器探测到的冲击波反射，当氢气在欧米茄管内释放时，储罐的压力将会增加。与直管相比，欧米茄形管内的压力要高得多。此外，当爆压低至2.19 Mpa时，管内甚至发生自燃，这意味着下游管子的几何形状对放氢自燃确实有重要影响，使用欧米茄形管子降低了自燃所需的临界压力。当爆破压力低于4.09 Mpa时，管内发生自燃，排气室内形成火焰，但没有发生火焰分离。
An experimental study on flow characteristics and spontaneous ignition produced by pressurized hydrogen release through an Omega-shaped tube into atmosphere was conducted. This paper aims to study the influence of geometry of downstream tube on the shock waves and the spontaneous ignition of pressurized hydrogen release. The tube used in present experiments is an Omega-shaped tube. It is found that the pressure of the tank will undergo an increase when hydrogen is releasing in the Omega-shaped tube because of the shock wave reflection which is detected by the piezoelectric pressure transducers. The pressure inside the Omega-shaped tube is much higher compared with straight tubes. Additionally, the spontaneous ignition even occurs inside the tube when burst pressure is as low as 2.19 MPa, which means that the geometry of downstream tube does have an important influence on the spontaneous ignition of hydrogen release and using an Omega-shaped tube reduces the critical pressure required for spontaneous ignition. When burst pressure is below 4.09 MPa, the spontaneous ignition occurs inside the tube and flame is formed inside the exhaust chamber but no flame separation happens.