船用柴油机增压器喘振的计算与特性分析  

Calculation and characteristic analysis on turbocharger surging of marine diesel engine

作　　者：孙建波[1] 郭晨[1] 魏海军[1] 于洪亮[1] 黄加亮[2] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026 [2]集美大学轮机工程学院,福建厦门361021

出　　处：《大连海事大学学报》2008年第1期28-31,36,共5页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(60774046);福建省自然科学基金资助项目(A0410024)

摘　　要：为研究压气机喘振的特点和影响因素,在现有船用四冲程柴油机仿真模型基础上,对压气机系统的模型进行改进,建立可以预测压气机喘振动态特性的仿真模型,提出确定压气机非稳定工况特性曲线的方法.柴油机在变工况下压气机发生喘振的仿真计算表明:柴油机的进气流通面积减小会造成压气机喘振,流通面积越小,喘振周期越短;空气流经压气机的时间延迟会影响压气机喘振的振幅,但不会改变喘振的周期;柴油机进气管的容积对喘振的振幅无影响,但会改变喘振的周期.计算结果和实验数据基本吻合.An improved compressor simulation model based on current model of four-stroke diesel engine was presented to analyze characteristics and influence factors of compressor surging. A method for estimating compressor characteristics in the region beyond the surge line was proposed. Simulation on marine diesel engine under variable operation conditions shows that surge occurs in case of reducing flow area of the engine intake manifold. The surge period becomes shorter with air inlet flow area decreasing. The amplitude of compressor surge decreases with the value of time delay when the air passing through the compressor increasing, whereas the surge period remains approximately constant. The volume of engine intake manifold obviously affects the duration of the surge period but has no influence on amplitude of compressor surge. Calculation results match well with the test results.

关 键 词：船用柴油机 增压器 压气机喘振 仿真 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程] TP391.9[自动化与计算机技术—计算机应用技术]