Investigation of the spray combustion characteristics of biodiesel (rapeseed methyl ester) and diesel

被引：0

作者：

Qi W. ^{[1
]}

Ming P. ^{[1
]}

Zhang W. ^{[1
]}

Zhao H. ^{[1
]}

机构：

[1] College of Power and Energy Engineering, Harbin Engineering University, Harbin

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2019年 / 40卷 / 08期

关键词：

Biodiesel; Diesel; Flame lift-off length; Fuel spray; Physical properties of fuel oil;

D O I：

10.11990/jheu.201805070

中图分类号：

学科分类号：

摘要：

In this study, we developed a complete mathematical model of fuel atomization and combustion based on the general transport equation analysis (GTEA) code, and established a database of the physical properties of diesel and biodiesel to compare biodiesel and diesel performances in spray and combustion. In this experiment, we validated the liquid-core and flame lift-off lengths of diesel and biodiesel fuels against those reported in the literature. We discuss the effect of the physical properties of fuel on the spray and combustion processes, and analyze the different spray and combustion characteristics of diesel and biodiesel. The calculation results show that a greater surface tension in biodiesel restrains the break-up of liquid drops, and poorer evaporation characteristics slow the evaporation speed, which increases the diameter and momentum of biodiesel droplets and leads to a longer liquid-core in biodiesel than diesel. Although the combustion characteristics of biodiesel and diesel are similar, the differences in their physical properties and evaporation characteristics result in biodiesel having a longer lift-off length. Parametric studies indicate that the diameter of the nozzle has a great influence on the liquid-core and lift-off lengths of biodiesel. Thus, decreasing the diameter of the nozzle can reduce the liquid-core and lift-off lengths, which is beneficial to the application of biodiesel in the existing diesel engine. © 2019, Editorial Department of Journal of HEU. All right reserved.

引用

页码：1468 / 1473

页数：5

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