进排气系统结构参数对发动机工作不均匀性的影响  

Influence on structure parameters of intake and exhaust system on the non-uniformity of engine

作　　者：梁文威 唐元元[1] 邝文涛 张琦 LIANG Wenwei;TANG Yuanyuan;KUANG Wentao;ZHANG Qi(Marine Engineering College,Dalian Maritime University,Dalian 116000,China)

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116000

出　　处：《舰船科学技术》2025年第6期110-115,共6页Ship Science and Technology

基　　金：国家重点研发计划资助项目(2022YFB4301403);高技术船舶科研项目(CBG3N21-3-3)。

摘　　要：进排气系统是发动机的重要组成部分,其设计的优劣程度直接决定了发动机的整体性能,为了更加深入地研究发动机进排气管道结构对发动机气缸主要性能均匀性的影响,对建立的发动机一维模型进行关于管道结构的仿真实验。结果表明,进气管长度变化会引起气缸最大压力、排气温度、平均有效压力(IMEP)和制动比油耗(BSFC)出现不均匀现象;当进气管径差值为6 mm时,各性能参数不均匀性达到最大;进气总管长度增加时,气缸最大压力和排气温度的不均匀度几乎保持不变,而BSFC不均匀度则有所增加;进气总管直径增加会引起气缸IMEP和BSFC出现不均匀现象。排气管长增加及管径增大时,气缸不均匀性整体上呈下降趋势;排气总管结构参数的变化对气缸工作不均匀性的影响较小。The intake and exhaust systems are critical components of an engine,the quality of whose design directly determines the overall performance of the engine.To study more deeply the impact of the structural design of the intake and exhaust pipes on the uniformity of the main performance parameters of the engine cylinders,a series of simulation experiments concerning pipe structure were conducted on a one-dimensional engine model that was established for this purpose.The results showed that variations in the length of the intake pipe can lead to non-uniformity in the maximum cylinder pressure,exhaust temperature,Indicated Mean Effective Pressure(IMEP),and Brake Specific Fuel Consumption(BSFC).When the difference in intake pipe diameter is 6mm,the non-uniformity of each performance parameter reaches its peak.When the length of the intake manifold is increased,the degree of non-uniformity in the maximum cylinder pressure and exhaust temperature remains almost unchanged,whereas the non-uniformity in BSFC increases.An increase in the diameter of the intake manifold leads to non-uniformity in IMEP and BSFC.When the length and diameter of the exhaust pipe are increased,the overall non-uniformity of the cylinder decreases.Changes in the structural parameters of the exhaust manifold have a relatively small impact on the working non-uniformity of the cylinders.

关 键 词：发动机性能 进排气系统 不均匀现象 建模仿真 

分 类 号：TK432[动力工程及工程热物理—动力机械及工程]