[1]孙朝栋,许伯彦*,张寿荣.二冲程直喷汽油机混合气形成的数值解析研究[J].山东建筑大学学报,2016,(02):153-157.
 Sun Chaodong,Xu Boyan*,Zhang Shourong.Numerical simulation of stratified mixture formation for two-stroke engine direct injection gasoline[J].Journal of Shandong jianzhu university,2016,(02):153-157.
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二冲程直喷汽油机混合气形成的数值解析研究()
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
期数:
2016年02期
页码:
153-157
栏目:
研究论文
出版日期:
2016-04-15

文章信息/Info

Title:
Numerical simulation of stratified mixture formation for two-stroke engine direct injection gasoline
作者:
孙朝栋1 许伯彦1* 张寿荣2
(1.山东建筑大学 机电工程学院,山东 济南 250101;2.山东交通职业学院 泰山分院,山东 泰安271000)
Author(s):
Sun Chaodong1 Xu Boyan1*Zhang Shourong2
(1.School of Mechanical and Electrical Engineering, Shandong Jianzhu University, Jinan 250101, China; 2. Taishan Campus, Shandong Transport Vocational College, Taian 271000, China)
关键词:
二冲程直喷汽油机壁面引导混合气数值解析
Keywords:
two-stroke DI engine wall guided combustion system mixture formation numerical simulation
分类号:
TK411
文献标志码:
A
摘要:
二冲程汽油机具有升功率高、做功密度大、运转平稳、结构简单等优点。文章依据四冲程缸内直喷汽油机结构特点,提出了区别于传统的曲轴箱扫气形式的、具有弯曲活塞顶的壁面引导式二冲程直喷汽油机的分层稀薄燃烧系统,利用纹影实验验证了数值解析计算方法的可行性,使用AVL Fire软件数值阐明了壁面引导式二冲程直喷汽油机在不同负荷工况(4800r/min)时缸内混合气形成的过程。结果表明:在部分负荷工况时,燃油在压缩过程中后期喷射,接近点火时刻(25°CA BTDC)火花塞电极附近形成了理想的可燃分层混合气构造,燃烧室的整体空燃比可达到40:1;在大负荷工况时,燃油在扫气后期喷射,接近活塞压缩终了气缸内可形成均质可燃混合气,且不造成燃油短路。
Abstract:
Two-stroke gasoline engine has the advantages of high power density, rising power, stable operation, simple structure etc. According to the structure characteristics of the direct injection four stroke engines, the paper put forward a wall guided combustion system used in two-stroke engine which is different from traditional forms of crankcase scavenging structure. By using the schlieren experiment the feasibility of the numerical analytical method is verified. Stratified mixture formation in part load condition(4800r/min) for the new combustion system was numerically simulated. Simulation results show that gasoline spray forms a stable richer stratified mixture around the spark plug at the middle and later post-compression process injected in part load conditions, and the maximum global air-fuel ratio reaches 40, and the fuel wouldn’t get out of cylinder and could form a homogeneous mixture at scavenging schedule later injected in full load conditions.

相似文献/References:

[1]孙德志,刘盛强,刘鲁宁,等.液态LPG中心喷射发动机混合气形成的研究[J].山东建筑大学学报,2010,(06):581.
 SUN De-zhi,LIU Sheng-qiang,LIU Lu-ning,et al.Research on mixture formation of LPG for a center injection DISI engine[J].Journal of Shandong jianzhu university,2010,(02):581.
[2]彭明国,许伯彦,*,等.二冲程CNG直喷发动机混合气形成过程数值解析[J].山东建筑大学学报,2019,34(01):48.[doi:10.12077/sdjz.2019.01.008]
 PENG Mingguo,XU Boyan,*,et al.Numerical analysis of formation process of mixture gas in two-stroke CNG direct injection engine[J].Journal of Shandong jianzhu university,2019,34(02):48.[doi:10.12077/sdjz.2019.01.008]

更新日期/Last Update: 2016-03-22