Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 34, Issue 5, Pages 2488-2493Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2009.01.012
Keywords
Hydrogen engine; Laser induced breakdown spectroscopy; Stratified charge; Mixture distribution; Cooling loss
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Reduction in cooling loss due to the heat transfer from burning gas to the combustion chamber wall is very important for improving the thermal efficiency in hydrogen engines. The previous research has shown that the direct injection stratified charge can be a technique to reduce the cooling loss and improve thermal efficiency in hydrogen combustion. For effective reductions in cooling loss by the stratified charge, it is very important to know the relation between the fuel injection conditions and mixture distribution. The current research employs the laser induced breakdown spectroscopy as a method to measure the hydrogen concentration distribution in the direct injection stratified charge. Measurement of instantaneous local equivalence ratio by the method clears the characteristics of mixture formation in hydrogen direct injection stratified charge. This research also tries to actively control the mixture distribution using a split fuel injection. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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