Please wait a minute...
J4  2011, Vol. 45 Issue (7): 1232-1238    DOI: 10.3785/j.issn.1008-973X.2011.07.015
机械与能源工程     
液化石油气直喷发动机混合气形成的解析
许伯彦1,徐娟1,齐运亮1,蔡少娌2
1.山东建筑大学 机电工程学院, 山东 济南 250101; 2. 济南大学 机械工程学院, 山东 济南 250022
Simulation of mixture formation in direct injection LPG engine
XU Bo-yan1,XU Juan1,QI Yun-liang1,CAI Shao-li2
1. School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101, China;
2. School of Mechanical Engineering, University of Jinan, Jinan 250022, China
 全文: PDF  HTML
摘要:

利用LPG易蒸发汽化的燃料特性,提出一种使用喷嘴中心布置的屋脊型燃烧室和平顶活塞的LPG直喷发动机均质混合气形成方法.为了验证该方法的可行性,使用CFD工具研究采用该方法时缸内混合气的形成过程,分析燃料喷射起始时刻和负荷对混合气形成过程的影响.结果表明:大负荷时形成的进气滚流和小负荷形成的进气斜涡流在压缩过程末期破碎成小尺度湍流,加速了缸内均质混合气的形成;即使负荷不同,采用进气过程前期(60~80°CA ATDC)喷射,均可在压缩过程接近终了时形成较均匀的可燃混合气.

Abstract:

A method to form homogeneous mixture using a combination of liquid phase liquefied petroleum gas (LPG) low pressure direct injection, pent-roof type of combustion chamber, flat-topped piston and center-located injector layout was presented. The mixture formation processes in cylinder were investigated using the CFD code in order to validate the method. The effect of different injection times and engine loads on the mixture formation processes was analyzed. Simulation results showed that the intake tumble at high load conditions and the inclined intake swirl at part load conditions broke into small-scale vortex turbulence near the end of the compression stroke, which enhanced the homogeneous mixture formation. If the liquid phase LPG is injected at 60-80°CA ATDC in intake stroke even at different loads, the more homogeneous mixture can be formed near the end of the compression stroke.

出版日期: 2011-07-01
:  TK 46.4  
基金资助:

国家自然科学基金资助项目(51076085);山东省自然科学基金资助项目(ZR2009FM032);山东省科技攻关项目(2007GG10007004).

作者简介: 许伯彦(1953-),男,教授,从事汽车发动机工作过程的研究.E-mail: xubyyy@163.com
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
作者相关文章  

引用本文:

许伯彦,徐娟,齐运亮,蔡少娌. 液化石油气直喷发动机混合气形成的解析[J]. J4, 2011, 45(7): 1232-1238.

XU Bo-yan,XU Juan,QI Yun-liang,CAI Shao-li. Simulation of mixture formation in direct injection LPG engine. J4, 2011, 45(7): 1232-1238.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.07.015        https://www.zjujournals.com/eng/CN/Y2011/V45/I7/1232

[1] LI L Q, WANG Z S, GONG C M, et al. Investigation of coldstart based on cyclebycycle control strategy in an EFI LPG engine [C]∥ Proceedings of 2004 Powertrain and Fluid Systems Conference and Exhibition. Warrendale: SAE, 2004: 2004-01-3059.
[2] SAWUT U. Identification and robust control of LPG fuel supply system [C]∥ Proceedings of 2009 SAE World Congress and Exhibition. Warrendale: SAE, 2009: 2009-01-1025.
[3] 邵千钧. 电控LPG发动机及其缸内直接喷射技术的研究[D]. 杭州:浙江大学, 2003.
SHAO Qianjun. Study on electronic controlled LPG fueled engine and its direct injection technology [D]. Hangzhou: Zhejiang University, 2003.
[4] 李西秦, 徐兆坤, 邵千钧, 等. LPG喷射形式对发动机性能的影响[J]. 内燃机工程, 2004, 25(2): 43-45.
LI Xiqin, XU Zhaokun, SHAO Qianjun, et al. The influences of LPG injection methods on engine performance [J]. Chinese Internal Combustion Engine Engineering, 2004, 25(2): 43-45.
[5] MESMAN P. The spray behavior of liquid LPG at different backpressures during injection in a constant volume chamber [C]∥ Proceedings of 2009 Powertrains, Fuels and Lubricants Meeting. Warrendale: SAE, 2009: 2009-01-1834.
[6] BORETTI A. Development of a direct injection spark ignition engine running alternative liquid fuels [C]∥ Proceedings of 2009 Powertrains, Fuels and Lubricants Meeting. Warrendale: SAE, 2009: 2009-01-1881.
[7] 杨妙梁. 欧洲直喷式汽油机发展动向:宝马与大众直喷式汽油机[J]. 汽车与配件,2003, 31: 22-25.
YANG Miaoliang. Trends development of the European direct injection gasoline engines: BMW and Volkswagen direct injection gasoline engines [J]. Automobile and Parts Technology, 2003, 31: 22-25.
[8] 许伯彦, 耿德强, 齐运亮, 等. 液态LPG燃料喷射过程的数值解析及可视化实验[J]. 内燃机学报, 2009, 27(2): 146-152.
XU Boyan, GENG Deqiang, QI Yunliang, et al. Simulation and visualization of liquid phase LPG spray [J]. Transactions of CSICE, 2009, 27(2): 146-152.
[9] AVL List GMBH. Fire user manual [M]. Graz,Austria: AVL List GMBH, 2008: 314-325.
[10] 刘书亮, 冯洪庆, 王天友, 等. 四气门火花点火发动机气缸内的滚流运动[J]. 燃烧科学与技术, 2004, 10(2): 181-186.
LIU Shuliang, FENG Hongqing, WANG Tianyou, et al. Tumble motion in the cylinder of the 4valve spark ignition engines [J]. Journal of Combustion Science and Technology, 2004, 10(2): 181-186.

No related articles found!