雰囲気酸素濃度・温度分布の不均一性がディーゼル燃焼に及ぼす影響 : 第3報,酸素濃度と温度の不均一性の影響(熱工学,内燃機関,動力など)

Abstract

In order to clarify the effect of heterogeneity of distributions of temperature and oxygen concentration in a combustion chamber induced by EGR on the soot and NO emissions from the diesel engine, the combustion characteristics and emissions of diesel spray flame achieved in a rapid compression machine (RCM) at various patterns of temperature and oxygen concentration distributions in the chamber are investigated. Results indicate that the NO_x and soot emissions from diesel combustion are governed mainly by the amounts of oxygen and enthalpy entrained into the spray upstream the ignition region, when the temperature distribution and oxygen concentration distribution in a chamber are changed with keeping the total amounts of oxygen and enthalpy of surrounding gas in a chamber at constants.