Numerical simulation of stratified scavenging two-stroke gasoline engine

被引：0
|
作者：
Ma Y. [1 ]
Yang H. [1 ]
Xu G. [1 ]
机构：
[1] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 09期
关键词：
CFD simulation; One-dimension performance simulation; Scavenging loss; Stratified scavenging; Two-stroke;
D O I：
10.13224/j.cnki.jasp.2019.09.017
中图分类号：
学科分类号：
摘要：
A three-dimensional model of stratified scavenging engine was established to study the scavenging characteristics and working mechanism of stratified scavenging engine, then three-dimensional CFD software Fluent was used to simulate and analyze the fluid structure with or without stratified scavenging system at rated speed, and the boundary conditions required for its calculation were obtained by one-dimensional simulation calculation of the engine. Results showed that, the stratified scavenging engine used pure air to form a stratification between the fresh mixture and the exhaust gas during operation, a part of the scavenging loss was taken by the pure air, which reduced 15% of unburned hydrocarbon and improved the fuel economy of the engine; the stratified scavenging engine and the non-stratified scavenging engine had a scavenging efficiency of 75%, without significant effect on the scavenging efficiency. The results of the research can provide reference for the design of stratified scavenging engines. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：2001 / 2009
页数：8
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