Effect of fuel injection characteristics on the performance of a free-piston diesel engine linear generator: CFD simulation and experimental results

被引：40

作者：

Guo, Chendong ^{[1
]}

Song, Yu ^{[1
]}

Feng, Huihua ^{[1
]}

Zuo, Zhengxing ^{[1
]}

Jia, Boru ^{[1
,2
]}

Zhang, Ziwei ^{[1
]}

Roskilly, A. P. ^{[2
]}

机构：

[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China

[2] Newcastle Univ, Sir Joseph Swan Ctr Energy Res, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

ENERGY CONVERSION AND MANAGEMENT | 2018年 / 160卷

基金：

英国工程与自然科学研究理事会;

关键词：

Free-piston diesel engine linear generator; The injection timing; The injection rate-profile; CDF simulation; Experimental results; PARAMETERS; DESIGN;

D O I：

10.1016/j.enconman.2018.01.052

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The free-piston diesel engine linear generator (FPDLG), as a novel energy conversion device, is investigated by many researcher groups. The injection characteristics are important for the FPDLG operation performance. Therefore, the effects of fuel injection characteristics on the FPDLG are researched by CDF simulation and experimental results in this paper. According to the results, it is found that the trends of the compression ratio and the peak in-cylinder pressure vs the injection timing are the identical with convex function curves. And the IMEP of the FPDLG also show the same trend. Although the heat-release rises in the rapid combustion period, the IMEP vs the injection timing various law present convex function curve on account of reduced heat-release in the normal combustion period. Four injection rate-profiles, i.e. rectangle, wedge, trapezium and triangle are simulated and compared. It is observed that the combustion process with the trapezium rate-profile curve is smoother. The peak in-cylinder pressure and the thermal efficiency can be kept high value while the center of heat-release curve near the TDC. Therefore the trapezium rate-profile is suggested is appropriate and can keep high efficiency of the FPDLG in order to get high engine efficiency.

引用

页码：302 / 312

页数：11

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