Effect of Ambient Gas on Spray and Entrainment Characteristics of Hydrogen Jet

被引：0
|
作者：
Deng J. [1 ]
Zhong H. [1 ]
Gong X. [1 ]
Gong Y. [1 ]
Li L. [1 ,2 ]
机构：
[1] School of Automotive Studies, Tongji University, Shanghai
[2] CDHK, Tongji University, Shanghai
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2019年 / 37卷 / 01期
关键词：
Entrainment; Hydrogen jet; Mach disk; Penetration;
D O I：
10.16236/j.cnki.nrjxb.201901010
中图分类号：
学科分类号：
摘要：
The hydrogen jets under argon and nitrogen atmosphere were simulated by the RANS method. The effects of gas pressure, gas temperature and shock wave on spray and entrainment characteristics of hydrogen jet were studied. It is found that the penetration of the jet presents three stages of changes due to the Mach disk. The entrainment capacity of the jet at different injection pressures increases with the increase of the nozzle pressure ratio(NPR)in the early stage but the opposite trend in the later stage. Under the same density, the shock wave affects the entrainment in the early stage of jet, but the effect gradually decreases with the development of jet. With the increase of temperature, the penetration of hydrogen jet increases obviously, but the jet entrainment capacity decreases significantly. In addition, the entrainment amount of ambient gas and the entrainment capacity of hydrogen jet under a nitrogen atmosphere are both stronger than those under an argon atmosphere. © 2019, Editorial Office of the Transaction of CSICE. All right reserved.
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页码：68 / 75
页数：7
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