柴油机燃用含氧燃料后缸内传热研究  

Study on Heat Transfer In-Cylinder of Diesel Engine Operating on DMC/Diesel Blend Fuel

作　　者：訾琨[1,2] 黄永青[2] 陈飞[3] 沈若愚[3] 潘克煜[3] 

机构地区：[1]广东白云学院,广州510450 [2]宁波工程学院汽车系,宁波315016 [3]西安交通大学汽车系,西安710049

出　　处：《内燃机工程》2010年第1期88-91,96,共5页Chinese Internal Combustion Engine Engineering

基　　金：宁波市自然科学基金项目(2008A610066)

摘　　要：从柴油机缸内传热着手,对柴油机燃用柴油和碳酸二甲酯(DMC)混合燃料后,柴油机缸内传热规律和热效率以及动力性进行了研究。研究结果表明:燃用柴油和DMC混合燃料后,柴油机缸内燃烧改善,热效率提高约0.56%;碳烟减少约50%。从而导致缸内辐射传热量及传热损失减少,在DMC添加比为15%时,缸内辐射传热量下降20%,约占缸内总传热量的2.4%。传热损失减少主要是通过冷却水带走的热量减少,其减少量约占缸内总传热量的2.5%,和辐射传热量下降大致相当。A study on the heat transfer in cylinder, thermal efficiency and power output of a diesel en gine fueled with DMC-diesel blend was carried out. The results show that compared to fueled with pure diesel, combustion can be improved, the thermal efficiency is increased by 0.56 %, the smoke emission is decreased by 50 %, the radiation heat flux and heat transfer loss are reduced. When DMC proportion is 15 %, the in-cylinder radiation heat flux is decreased by 20 %, accounting for 2.4 % of the in-cylinder total heat flux. The heat transfer loss reduction is mainly attributed to less heat transmitted to the coolant, its amount accounts for about 2.5 % of the in-cylinder total heat flux, almost equals to that of the radiation heat flux.

关 键 词：内燃机 柴油机 热平衡 传热 混合燃料 碳酸二甲酯 

分 类 号：TK421.1[动力工程及工程热物理—动力机械及工程]