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A Study on the Characteristics of Injection and Combustion with Directly Injected Hydrogen Fuel  

Lee, Seang-Wock (Department of Mechanical and Automotive Engineering, Kookmin University)
Kee, Wan-Soo (Graduate School of Automotive Engineering, Kookmin University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.15, no.5, 2007 , pp. 24-29 More about this Journal
Abstract
This study aims to provide a fundamental data for directly injected hydrogen fuel engines. Spray, ignition and combustion characteristics of hydrogen were studied using constant volume chamber. For spray visualization, hydrogen was vertically injected into a combustion chamber at various condition, for example, injection pressure, ambient pressure. And an argon laser was used for the shadowgraph photography by applying optical method. Also, to investigate heat-release rate and flame propagations, spark was ignited on hydrogen injected at the different time after injection and the duration of injection was also changed. Processes of ignition and combustion were analyzed by heat-release rate calculated by pressure history and were observed by shadowgraph photography The results gave much knowledge of spray, ignition and combustion characteristics of hydrogen.
Keywords
Hydrogen; Direct-injection; Spray; Combustion; Visualization; NOx;
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