Abstract
Abstract: NOx is produced by a diesel engine due to hightemperatures available in the combustion chamber. Nitrogen isin diatomic nature in the air, but at high temperaturesavailable in the combustion chamber, it will divide intomonatomic form and this monatomic nitrogen reacts withOxygen to form NOx. To reduce this NOx formation in thediesel engine oxygen content is to be reduced in the intake air.It will be achieved by re-circulating some amount of exhaustgas into the combustion chamber through intake air.This present work discusses the piston bowl design andcontrol of nitric oxides by using exhaust gas recirculation indirect injection diesel engine. Hemispherical piston bowl of thedirect injection diesel engine is created with the help of PRO-Esoftware. This piston is used in CFD for analysis of emissionsreduction by the method of Exhaust gas recirculation atdifferent percentages. It is proposed to analyze this in CFD byusing STAR-CD as a tool.The results, which are obtained from the CFD are comparedwith Experimental results which are available in the literature.Index Terms: Hemispherical piston bowl, PRO-E, Directinjection diesel engine, piston bowl, Exhaust gas recirculation,CFD, NOx emissions, CO Emissions.
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