Experimental and computational investigation of effects of cooling intake air in NO x reduction and performance of diesel engines

Abstract

This study through the experimental and numerical investigation shows how the intercooler reduces NO <inf>x</inf> while making the engine performance improved and soot formation decreased. The effects of intercooler on combustion process will be investigated. Also numerical study was performed to investigate the global incylinder characteristics of intercooler system by means of FIRE-CFD code. Results indicated that although the rate of premixed burning increases by using of intercooler due to higher ignition delay period but as a result of lower temperatures in all combustion cycles the NO <inf>x</inf> emission decreases. Cooling intake air was an effective technique to reduce NO <inf>x</inf> emission and have shown a reduction of NO <inf>x</inf> by more than 50% for some operating conditions. © 2011 Knowledpa Review, Malaysia.