引流角对排气效果的影响  

Impact of Drainage Angle on Emission Effect

作　　者：甄杨泽 李明海[1] ZHEN Yangze;LI Minghai(College of Locomotive and Vehicle Engineering,Dalian Jiaotong University,Dalian 116028)

机构地区：[1]大连交通大学机车车辆工程学院,辽宁大连116028

出　　处：《内燃机》2021年第1期32-35,共4页Internal Combustion Engines

摘　　要：如今,废气涡轮增压器已经在柴油机领域普及,其原理是利用气缸排出废气中的能量推动涡轮机旋转,带动与其同轴的离心压气机工作,实现进气压力的提升。本文根据某型直列6缸柴油机,在前人基础上,对排气管引流角提出改进,并利用Fluent软件,分析对比了不同引流角对排气系统的影响。结果表明:采用较小的引流角有利于排气通畅,降低废气对排气管内壁的冲击,减少废气动能的损耗,从而提升能源利用率,降低排放污染。Nowadays,exhaust turbocharger has already popularized in engine field,whose principle is to drive coaxial centrifugal compressor to realize lift of intake pressure.According to certain in-line 6-cylinder diesel engine and its research before,this paper improves drainage angle,and analyzes and compares impact of different drainage angles on emission system by using Fluent Software.The result shows that using smaller angle is good to smooth exhausting,lowers impact of emissions to inside pipe wall and reduces loss of emission power,so as to increase utility ratio of power and decrease pollution.

关 键 词：柴油机 引流角 废气涡轮增压 排气系统 Fluent软件 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]