二级增压离心压气机效率特性对柴油机高原综合特性影响仿真  

Simulation on effect of efficiency characteristics of two-stage supercharged compressor on comprehensive characteristics of diesel engine at plateau

作　　者：杨春浩[1] 刘瑞林 张众杰 焦宇飞 夏南龙 YANG Chun-hao;LIU Rui-lin;ZHANG Zhong-jie;JIAO Yu-fei;XIA Nan-long(College of Power Engineering,Naval Univ.of Engineering,Wuhan 430033,China;Dept,of Military Vehicle,Army Military Transportation Univ.,Tianjin 300161,China)

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]陆军军事交通学院军用车辆系,天津300161

出　　处：《海军工程大学学报》2020年第6期53-59,66,共8页Journal of Naval University of Engineering

基　　金：国家部委基金资助项目(30105030201)。

摘　　要：进行二级增压离心压气机效率特性对柴油机高原综合特性影响研究,有助于为两级可调增压器变海拔自适应技术的发展提供理论支撑。因此,基于GT-ISE仿真软件,分析了压气机效率特性对柴油机变海拔(0 m、3 500 m、5 500 m)全负荷动力性、经济性及热负荷的影响。结果表明:高压级离心压气机高效圈向高压比小流量区域调整后,压气机循环平均效率明显提升,柴油机和压气机的联合运行线随海拔升高并向喘振线方向移动,海拔越高,低速转矩提升越大,低速燃油消耗率下降越明显;低压级离心压气机高效圈向低压比大流量区域调整后,在柴油机中高转速范围(1 300~2 100 r/min)内,压气机循环平均效率有所提升,且随海拔高度升高效率提升越多。The research on the influence of the efficiency characteristics of two-stage turbocharged compressor on the comprehensive characteristics of diesel engine at high altitude helps to provide theoretical support for the development of two-stage adjustable turbocharger at variable altitude adaptive technology. Based on GT-ISE simulation software, the effects of compressor efficiency characteristics on the dynamic, economic and thermal loads of diesel engine at variable altitudes(0 m, 3 500 m, 5 500 m) were simulated and analyzed. The results show that after adjusting the high efficiency ring of high pressure stage compressor to the area of high pressure ratio and small flow rate, the average cycle efficiency of compressor increases obviously. The combined running line of diesel engine and compressor moves towards surge line with the increase of altitude: the higher the low speed torque is, the more obvious the decrease of low speed fuel consumption rate is. After adjusting the high efficiency ring of low-pressure stage compressor to the high flow area with low pressure ratio, the average cycle efficiency of the compressor increases in the range of medium and high speed(1 300 ~2 100 r/min) of the diesel engine, and the higher the altitude.

关 键 词：二级增压离心压气机 效率特性 柴油机 高海拔 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]