燃油温度对直喷汽油机喷雾及着火特性的影响
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- 英文论文题名：Effects of Fuel Temperature on GDI Spray and Firing Behavior
- 论文作者：纪媌媌 ; 吴志军 ; 童孙禹 ; 李献菁 ; 邓俊 ; 胡宗杰
- 英文论文作者：Ji Miaomiao Wu Zhijun Tong Sunyu Li Xianjing Deng Jun Hu Zongjie School of Automotive Studies ; Tongji University ; Shanghai ; 200092
- 年：2013
- 作者机构：同济大学汽车学院;
- 论文关键词：直喷汽油机 ; 燃油温度 ; 喷雾 ; 着火特性
- 英文论文关键词：GDI ; Fuel temperature ; Spray ; Firing behavior
- 会议召开时间：2013-11-26
- 会议录名称：2013中国汽车工程学会年会论文集
- 英文会议录名称：Proceedings of 2013 SAE-China Congress
- 语种：中文
- 分类号：U464.171
- 学会代码：QCGC
- 会议名称：2013中国汽车工程学会年会
- 会议地点：中国北京
- 主办单位：中国汽车工程学会
- 学会名称：中国汽车工程学会
- 页数：4
- 文件大小：1401k
- 原文格式：O
- 会议级别：全国
摘要
基于三维CFD软件FIRE建立了适于描述直喷汽油机的喷雾模型和发动机模型,对不同燃油温度下的喷雾特性、缸内混合气形成进行了模拟研究,同时结合发动机台架试验对冷起动着火特性进行了研究。结果表明,随着燃油温度的升高,喷雾贯穿距缩短,喷雾索特平均直径(SMD)减小,燃油蒸发量大幅度提高,首循环着火燃烧得到改善,HC排放有一定程度的降低。
Effects of fuel temperature on GDI spray,fuel-air mixing process were studied by using CFD tool FIRE,while the effect of fuel temperature on firing behavior during cold starting was studied based on engine test bench.Simulation results showed that the increase of fuel temperature could decrease spray penetration and SMD.The mass fraction of fuel evaporated increased great simultaneously.The test results showed that as the fuel temperature increased,the combustion characteristics of the first firing cycle improved and HC emissions decreased slightly.
Effects of fuel temperature on GDI spray,fuel-air mixing process were studied by using CFD tool FIRE,while the effect of fuel temperature on firing behavior during cold starting was studied based on engine test bench.Simulation results showed that the increase of fuel temperature could decrease spray penetration and SMD.The mass fraction of fuel evaporated increased great simultaneously.The test results showed that as the fuel temperature increased,the combustion characteristics of the first firing cycle improved and HC emissions decreased slightly.
引文
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[2]佘金平,张煜盛,等.燃油温度对喷雾特性的影响研究[J].内燃机工程,2011,32:37-43.
[3]Aquino C,Plensdorf W,Lavoie G,et al.The occurrence of flash boiling in a port injected gasoline engine[C].SAE Paper,1998,982522.
[4]Zuo B,Gomes A M,Rutland C J.Modeling superheated fuel sprays and vaporization[J].International Journal of Thermal Sciences,2000(1):321 -336.
[5]Moon S,Choi J,Abo - Serie E,et al.The effects of injector ??temperature on spray and combustion characteristics in a single cylinder DISI engine[C].SAE Paper,2005 -01- 0101.
[6]Araneo L,Coghe A,Brunello G,et al.Effects of fuel temperature and ambient pressure on a GDI swirled injector spray[C].SAE Paper,2000 -01 - 1901.
[7]Zimmermann F,Bright J,Ren WM,et al.An internally heated tip injector to reduce HC emissions during cold - start [C].SAE Paper,1999 -01 -0792.
[8]卞江.基于燃油加热的直喷汽油机喷雾及启动工况试验研究[D].上海:同济大学,2013.