|Table of Contents|

Research on spray angle of an opposed-piston free-piston engine(PDF)

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

Issue:
2020年04期
Page:
400-408
Research Field:
Publishing date:

Info

Title:
Research on spray angle of an opposed-piston free-piston engine
Author(s):
Zhang QinglinXu ZhaopingLiu ShuangshuangLiu Liang
School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
Keywords:
opposed-piston free-piston engine simulation spray angles computational fluid dynamics fuel distribution
PACS:
TK412.2
DOI:
10.14177/j.cnki.32-1397n.2020.44.04.003
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%.

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.

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Last Update: 2020-08-30