Three-dimension models of the effects of combustion chamber geometry on combustion characteristics in a DI diesel engine

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School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China [1 ]
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Beijing Jiaotong Daxue Xuebao | 2007年 / 4卷 / 115-119期
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In order to study the effects of combustion chamber geometry on combustion characteristics in a DI diesel engine, CFD software FIRE is used to simulate the combustion processes in four types of combustion chambers of the diesel engines. The effect mechanism of the combustion chamber geometry is analyzed. Results show that the combustion chamber geometry exerts considerable influence on in-cylinder flow field, spray and combustion performance. The intensity of flow in the re-entrant type combustion chamber is stronger than that in the Maxican-hat geometry combustion chamber. As a result, the fuel/air mixing and combustion performance of the re-entrant type chamber are better than that of the Maxican-hat type chamber.
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