柴油机采用扩张排气支管的流动特性试验研究  

Experimental Investigation in the Flow Characteristic of a Divergent Exhaust Branch Used for Diesel Engines

作　　者：朱义伦[1] 顾宏中[1] 邓康耀[1] 

机构地区：[1]上海交通大学,上海200030

出　　处：《柴油机》2001年第4期17-20,44,共5页Diesel Engine

摘　　要：随着柴油机增压程度的提高，对排气系统的设计提出了新的要求．由于涡轮增压器综合效率的提高及柴油机向小气门重叠角方向的发展，许多高增压柴油机采用单排气总管排气系统．本文用试验手段研究了单排气总管系统采用扩张排气支管的流动特性，研究了排气支管的适度扩张有利于发动机缸内低压循环的基本原理．With the supercharging of diesel engines brought to higher levels, new demand has been set on the design of engine exhaust systems. Meantime, with the increase in overall efficiency of turbochargers and the development of diesel engines towards smaller valve overlap, exhaust systems with single exhaust manifold have been adopted for many highly supercharged diesel engines. By way of experiment, researches have been conducted to investigate the flow characteristic of divergent exhaust branch applied in a single exhaust manifold system, and the basic principles on which a moderate diver- gence of the exhaust branch may be advantageous to the in-cylinder low pressure cycle of highly boosted diesel engines.

关 键 词：柴油机 单排气总管 扩张排气支管 流动特性 试验研究 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]