Effect of high injection pressure on mixture formation, burning process and combustion characteristics in diesel combustion

Khalid, Amir and Manshoor, Bukhari Effect of high injection pressure on mixture formation, burning process and combustion characteristics in diesel combustion. World Academy Of Science, Engineering and Technology 71 2012 .



The mixture formation prior to the ignition process plays as a key element in the diesel combustion. Parametric studies of mixture formation and ignition process in various injection parameter have received considerable attention in potential for reducing emissions. Purpose of this study is to clarify the effects of injection pressure on mixture formation and ignition especially during ignition delay period, which have to be significantly influences throughout the combustion process and exhaust emissions. This study investigated the effects of injection pressure on diesel combustion fundamentally using rapid compression machine. The detail behavior of mixture formation during ignition delay period was investigated using the schlieren photography system with a high speed camera. This method can capture spray evaporation, spray interference, mixture formation and flame development clearly with real images. Ignition process and flame development were investigated by direct photography method using a light sensitive high-speed color digital video camera. The injection pressure and air motion are important variable that strongly affect to the fuel evaporation, endothermic and prolysis process during ignition delay. Increased injection pressures makes spray tip penetration longer and promotes a greater amount of fuel-air mixing occurs during ignition delay. A greater quantity of fuel prepared during ignition delay period thus predominantly promotes more rapid heat release.

Item Type:Article
Uncontrolled Keywords:mixture formation;diesel combustion;ignition process;spray;rapid compression machine
Subjects:T Technology > TJ Mechanical engineering and machinery > TJ751-805 Miscellaneous motors and engines
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Plant and Automotive Engineering
ID Code:3536
Deposited By:Dr. Amir Khalid
Deposited On:06 Mar 2013 12:29
Last Modified:06 Mar 2013 12:29

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