A study on auto-ignition/combustion characteristics of high pressurized hydrogen jets

被引：0

作者：

Tsujimura, Taku ^{[1
]}

Tokunaga, Yoshiroh ^{[1
]}

Senda, Jiro ^{[1
]}

Fujimoto, Hajime ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Doshisha University, Tatara, Kyotanabe-shi, Kyoto 610-032

来源：

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B | 2003年 / 69卷 / 687期

关键词：

Auto-ignition; Direct injection diesel engine; Heat release; Hydrogen; Mixture formation;

D O I：

10.1299/kikaib.69.2517

中图分类号：

学科分类号：

摘要：

In this study, authors investigated the characteristics of auto-ignition/combustion of high pressurized hydrogen jets to improve performances of a direct-injection, diesel engine fueled with hydrogen. The experiments were conducted by simulating a diesel-like combustion field in a constant-volume combustion vessel. The objective of the study was to clarify physical and chemical effects on auto-ignition delay and heat release by changing the variables of injection pressure, orifice diameter, ambient gas temperature and ambient gas oxygen concentration in the experiments. The results show that auto-ignition delays of hydrogen jets are strongly dependent on the ambient gas temperature and that the ambient gas oxygen concentration has a weak effect on the auto-ignition delays. And it is also clarified that when the ambient gas temperature is relatively high, auto-ignition delays of hydrogen jets are almost the same for various conditions of ambient gas oxygen concentration and injection, but that injection conditions have a significant effect on the rate of heat release of hydrogen jets. It can be concluded that the mixture formation process plays an important role for the auto-ignition/combustion of hydrogen jets.

引用

页码：2517 / 2522

页数：5

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