单缸柴油机新型排气净化消声器流场特性研究  

Study on flow field characteristics of the new exhaust muffler for a single-cylinder diesel engine

作　　者：伏军 王伟晟[1] 郑唯 李放 陈政宏 FU Jun;WANG Weisheng;ZHENG Wei;LI Fang;CHEN Zhenghong(School of Mechanical and Energy Engineering,Shaoyang University,Shaoyang 422000,China;Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing,Shaoyang University,Shaoyang 422000,China;Hunan Xinbinhu Engine Co.,Ltd.,Yiyang 413000,China)

机构地区：[1]邵阳学院机械与能源工程学院,湖南邵阳422000 [2]邵阳学院高效动力系统智能制造湖南省重点实验室,湖南邵阳422000 [3]湖南新滨湖发动机有限公司,湖南益阳413000

出　　处：《邵阳学院学报（自然科学版）》2021年第6期34-42,共9页Journal of Shaoyang University：Natural Science Edition

基　　金：国家自然科学基金项目(52076141);湖南省教育厅科学研究项目(19A453);湖南省教育厅重点项目(18A395);湖南省重点研发计划项目(2018GK2074);湖南省教育厅研究生科研创新项目(CX20201177);邵阳学院研究生科研创新项目(CX2020SY004)。

摘　　要：以某单缸柴油机为研究对象,提出一种新型排气净化消声器方案。基于计算流体动力学(computational fluid dynamics,CFD)技术对新型排气净化消声器及原排气消声器内部速度场、压力场、温度场以及再生噪声分布进行了对比研究分析。结果表明,新型排气净化消声器与原排气消声器相比,新型排气净化消声器内部速度场、温度场分布更加均匀,有助于尾气中碳烟颗粒的捕集。压力损失降低了约0.3 kPa,再生噪声最大值提高4 dB,整体再生噪声减小4.9 dB。Taking a single-cylinder diesel engine as the research object,a new exhaust purification muffler scheme was proposed.Based on CFD(computational fluid dynamics)technology,internal velocity field,pressure field,temperature field and regenerative noise distribution of the new muffler and the original one were compared and analyzed.The results show that:compared with the original muffler,the distribution of velocity field and temperature field in the new one is more uniform,which is conductive to the capture of soot particles in the exhaust gas;the exhaust pressure loss is reduced by about 0.3 kPa,the maximum regenerative noise is increased by 4 dB,but the overall regenerative noise is reduced by 4.9 dB.

关 键 词：柴油机 净化消声器 流场 仿真分析 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]