8170型柴油机应用可变几何排气管增压系统的计算研究  

Calculation Study on the Variable Geometry Exhaust Manifold Turbo-charging System for the 8170 Diesel Engine

作　　者：王绍明[1] 邓康耀[1] 崔毅[1] 黄猛[2] 辛强之 陈山[2] 张国征[3] 

机构地区：[1]上海交通大学动力机械及工程教育部重点试验室,上海200030 [2]淄博柴油机总公司,山东淄博255077 [3]中国北方发动机研究所,山西大同037036

出　　处：《船海工程》2011年第2期84-88,90,共6页Ship & Ocean Engineering

基　　金：柴油机高增压技术国防科技重点实验室基金(9140C3307080802);国防预研项目(4010103010403)

摘　　要：为了实现8缸柴油机高低负荷兼顾,提出新的可变几何排气管增压系统,通过安装在排气管上的可控阀门来实现增压方式的转换。对可变几何排气管增压系统进行稳态和瞬态计算研究。稳态计算结果表明,与原机MPC增压系统相比,在25%、50%、75%和100%负荷时,可变几何排气管增压系统的平均扫气系数均大于MPC系统的平均扫气系数,油耗均小于MPC增压系统的油耗。瞬态计算结果表明,可控阀门关闭以后,压气机后进气压力增加的程度较大。In order to make the diesel engine can give a good performance both at the high load operation and the low load operation,a newly designed variable geometry exhaust manifold（VGEM） turbo-charging system was put forward for this engine.The VGEM turbo-charging system can realize the switch between two charging modes by the controllable valve.The simulations of the system in both steady state and transient state had been done.The steady simulation results indicated that in all 4 loads of 25%,50%,75% and 100%,the scavenging coefficient of the VGEM turbo-charging system is bigger than that of the MPC turbo-charging system,the BSFC of the VGEM turbocharging system is smaller than that of the MPC turbocharging system.The transient simulation results indicates that when the controllable valve is closed,the intake pressure after compressor increases more.

关 键 词：柴油机 可变几何 排气管 增压方式 涡轮增压 

分 类 号：U664.121[交通运输工程—船舶及航道工程] TK423.5[交通运输工程—船舶与海洋工程]