[1]张晴霖,徐照平,刘双双,等.对置式自由活塞发动机CFD建模与喷雾锥角研究[J].南京理工大学学报(自然科学版),2020,44(04):400-408.[doi:10.14177/j.cnki.32-1397n.2020.44.04.003]
 Zhang Qinglin,Xu Zhaoping,Liu Shuangshuang,et al.Research on spray angle of an opposed-piston free-piston engine[J].Journal of Nanjing University of Science and Technology,2020,44(04):400-408.[doi:10.14177/j.cnki.32-1397n.2020.44.04.003]
点击复制

对置式自由活塞发动机CFD建模与喷雾锥角研究()
分享到:

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
44卷
期数:
2020年04期
页码:
400-408
栏目:
出版日期:
2020-08-30

文章信息/Info

Title:
Research on spray angle of an opposed-piston free-piston engine
文章编号:
1005-9830(2020)04-0400-09
作者:
张晴霖徐照平刘双双刘 梁
南京理工大学 机械工程学院,江苏 南京 210094
Author(s):
Zhang QinglinXu ZhaopingLiu ShuangshuangLiu Liang
School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
对置活塞 自由活塞发动机 喷雾锥角 计算流体力学 燃料分布
Keywords:
opposed-piston free-piston engine simulation spray angles computational fluid dynamics fuel distribution
分类号:
TK412.2
DOI:
10.14177/j.cnki.32-1397n.2020.44.04.003
摘要:
为了进一步提升对置式自由活塞发动机的燃料利用效率与排放性能,采用三维计算流体力学方法对该发动机的喷雾锥角进行了参数化仿真。设计了中央燃烧室结构与喷雾引导式燃烧组织方案。建立了中央燃烧室三维网格模型,根据原型样机设置了计算模型与计算条件。分析了喷雾锥角对缸内燃料分布、燃烧放热率、缸内压力、CO排放量和缸内温度的影响。研究结果表明喷雾锥角为40°左右时,点火时刻缸内燃料分布最为理想,发动机能够获得97.5%的燃烧效率、39.7%指示热效率和低于0.4%的CO排放量。
Abstract:
In order to further improve the fuel utilization efficiency and emission performance of an opposed-piston free-piston engine,a computational fluid dynamics method is used to carry out a parametric simulation on spray angles of the engine. The structure of central combustor and the spray-guided combustion organization scheme are designed. A three-dimensional mesh model of the central combustor is established,and calculation models and calculation conditions are set according to the prototype. The effects of spray angle on fuel distribution,heat release rate,in-cylinder pressure,CO emissions and in-cylinder temperature are analyzed. The research results show that when the spray angle reaches 40°,the fuel distribution in the cylinder is the most ideal at ignition time. The engine can obtain 97.5% combustion efficiency,39.7% indicated thermal efficiency and CO emissions below 0.4%.

参考文献/References:

[1] 耿鹤鸣. 对置式液压自由活塞发动机的实验与仿真研究[D]. 天津:天津大学机械工程学院,2015.
[2]Schneider S,Chiodi M,Friedrich H,et al. Development and experimental investigation of a two-stroke opposed-piston free-piston engine[C]//Small Engine Technology Conference. Charleston,USA:SAE International,2016.
[3]Mohammed S,Ramlan N,Aziz A,et al. Investigation of late fuel injection position on the combustion of free piston engine[C]//World Engineering Science and Technology Congress. Kuala Lumpur,Malaysia:AIP Publishing,2018.
[4]谢钊毅. 对置活塞二冲程柴油机喷雾过程的实验研究与数值模拟[D]. 北京:北京理工大学机械与车辆学院,2016.
[5]马富康,赵长禄,张付军,等. 对置活塞二冲程汽油机喷油和点火定时影响分析[J]. 汽车工程,2015,37(9):992-1004.Ma Fukang,Zhao Changlu,Zhang Fujun et al. Effect analysis of injection and ignition times in opposed-piston two-stroke engine[J]. Automotive Engineering,2015,37(9):992-1004.
[6]王豪. 对置活塞二冲程直喷汽油缸内工作过程仿真研究[D]. 北京:北京理工大学机械与车辆学院,2016.
[7]于莹潇. 单缸液压自由活塞柴油机换气和燃烧过程研究[D]. 吉林:吉林大学汽车工程学院,2017.
[8]张鹏博,何义团,袁晨恒,等. 喷油策略对自由活塞直线发动机燃烧过程的影响[J]. 内燃机工程,2019,40(6):43-49.
Zhang Pengbo,He Yituan,Yuan Chenheng et al. Effect of fuel injection strategy on combustion process of a free-piston linear engine[J]. Chinese Internal Combustion Engine Engineering,2019,40(6):43-49.
[9]林继铭,徐照平,常思勤,等. 新型独立压缩自由活塞发动机仿真研究[J]. 南京理工大学学报,2013,37(1):101-106.
Lin Jiming,Xu Zhaoping,Chang Siqin. Simulation of novel independent compression free-piston engine[J]. Journal of Nanjing University of Science and Technology,2013,37(1):101-106.
[10]马富康,赵长禄,赵振峰,等. 对置活塞发动机缸内流动的模型分析与仿真验证[J]. 系统仿真学报,2016,28(7):1567-1574.
Ma Fukang,Zhao Changlu,Zhao Zhenfeng et al. In-cylinder flow analysis and verification of opposed-piston two-stroke engine[J]. Journal of System Simulation,2016,28(7):1567-1574.
[11]刘军萍,高功率密度OPOC柴油机喷雾-燃烧过程与喷油策略研究[D]. 山西:中北大学动力机械及工程,2013.
[12]曹志成,直喷汽油机直接启动过程中的燃烧和动力学模拟[D]. 天津:天津大学机械工程学院,2012.
[13]Jose R,Cervantes T. Direct injection system for a two stroke engine[D]. Sweden:Chalmers University of Technology,2011.

相似文献/References:

[1]常思勤,徐照平.内燃-直线发电集成动力系统概念设计[J].南京理工大学学报(自然科学版),2008,(04):449.
 CHANG Si-qin,XU Zhao-ping.Conceptual Design of Internal Combustion-linear Generator Integrated Power System[J].Journal of Nanjing University of Science and Technology,2008,(04):449.

备注/Memo

备注/Memo:
收稿日期:2020-04-22 修回日期:2020-07-10
基金项目:国家自然科学基金(51875290; 51975297)
作者简介:张晴霖(1996-),女,硕士生,主要研究方向:汽车动力装置,E-mail:zql775000919@163.com; 通讯作者:徐照平(1982-),男,博士,副教授,主要研究方向:汽车动力装置,E-mail:xuzhaoping@njust.edu.cn。
引文格式:张晴霖,徐照平,刘双双,等. 对置式自由活塞发动机CFD建模与喷雾锥角研究[J]. 南京理工大学学报,2020,44(4):400-408.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2020-08-30