Numerical Investigation of the Effect of Fuel Preheating on Combustion Process and Emission in a Direct Injection Diesel Engine

Numerical Investigation of the Effect of Fuel Preheating on Combustion Process and Emission in a Direct Injection Diesel Engine

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Part of #Numerical Investigation of the Effect of Fuel Preheating on Combustion Process and Emission in a Direct Injection Diesel Engine# :

Publishing year : 2009

Conference : 6th Conference of Internal Combustion Engines

Number of pages : 6

Abstract: The effect of fuel preheating on the combustion process and emissions in a D.I. The diesel engine is investigated using AVL Fire code. Computations are carried out using a three-dimensional model for flows, sprays and combustion in diesel engines. Four cases for initial fuel temperatures have been studied here as follows: Tfuel = 353, 373K as low temperature and Tfuel = 473, 523K. It is shown that increasing initial fuel temperature leads to increased atomization of the spray and better airfuel mixing. Also, reduced spray penetration due to increased evaporation prevents wall-film formation and significantly reduces the soot mass fraction. Mean pressure, temperature, and NOx mass fraction are increased due to improved combustion. The results of the model show a good agreement with the corresponding data in the literature.