自然吸气柴油机高海拔(低气压)热平衡试验研究  

Experimental study on thermal balance performance of naturally aspirated diesel engine at high altitude(low air pressure)

作　　者：董素荣[1] 许翔[1] 任晓江[1] 关立哲[1] 郑智[1] 刘瑞林[1] 

机构地区：[1]军事交通学院汽车工程系,天津300161

出　　处：《热科学与技术》2011年第4期366-370,共5页Journal of Thermal Science and Technology

基　　金：军队科研计划资助项目

摘　　要：基于内燃机高海拔(低气压)热平衡模拟试验台,对某型内燃叉车自然吸气柴油机进行了热平衡高原模拟试验,研究了柴油机燃烧放热量分配、冷却液温度以及排气温度等随海拔高度(大气压力)的变化规律。结果表明:随着海拔的升高,转化为有效功的热量、冷却水散热量以及排气带走的热量均不断下降,柴油机不完全燃烧造成的热损失、机体散失的热量以及其他热损失所占比重不断增加;与平原相比,海拔5 000m时,转化为有效功的热量平均下降了13.79%,冷却水散热量平均下降了2.27%,排气带走的热量平均下降了14.4%,发动机的热平衡性能与平原相比发生了较大的变化。The thermal balance performance of naturally as altitudes was studied on the engine thermal balance test bed P f irated forklift diesel engine at different or simulating with high altitude （low air pressure）. Influence of atmospheric pressure on the heat distribution, coolant temperature and exhaust gas temperature were analyzed. Results show that thermal changed into usable power, thermal carried by cooling water and exhaust gas decreased with the increase of altitude. On the contrary, the heat loss due to incomplete combustion increased with the increase of altitude. Compared with that at 5 000 m altitude, thermal changed into usable power decreased by 13.79%; thermal carried by cooling water decreased by 2.27%; thermal carried by exhaust air decreased by 14.4%. The thermal balance performance at high altitude is different from the performance at sea level.

关 键 词：自然吸气柴油机 高海拔(低气压) 热平衡 

分 类 号：TK421.26[动力工程及工程热物理—动力机械及工程]