周期性供油气助雾化直喷喷嘴雾化特性试验

吴泽俊; 何小民; 朱志新; 金义; 丁国玉

周期性供油气助雾化直喷喷嘴雾化特性试验

南京航空航天大学能源与动力学院,南京 210016

基金项目: 江苏省普通高校研究生科研创新计划(CXLX12_0167)

计量
- 文章访问数: 1892
- HTML浏览量: 139
- PDF量: 1434
- 被引次数: 0
出版历程
- 收稿日期: 2012-03-09
- 刊出日期: 2013-02-28

Experiment on spray characteristics of periodic air-assist direct injection atomizer

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 对一种典型的周期性供油气助雾化直喷喷嘴的雾化特性进行试验研究,分析总结了喷油脉宽、间隔时间、喷气脉宽以及空气压力对雾化性能的影响规律.试验中使用RP-3航空煤油作用工质,使用压缩空气作为介质;用激光粒度分析仪对油雾场进行测量并进行处理分析;喷油脉宽与喷气脉宽变化范围为2～8ms,间隔时间为-2～5ms,空气压力为0.1～0.65MPa.研究结果表明:随着气油比的增加,索太尔平均直径减小,均匀程度增加,雾化性能提高;增加空气压力,可以使空气密度增加,加大空气与燃油的气动作用力,有利于雾化性能的提高;增加间隔时间也可使雾化性能有小幅度的提升;在较大的平均粒径下,更加分散的粒径分布仍然可以具有较大的均匀度分布指数.对试验数据进行分析,在较高空气压力下,得到了该周期性供油气助雾化直喷喷嘴的平均粒径的经验计算模型.
- 周期性供油气助雾化直喷喷嘴 /
- 雾化特性 /
- 索太尔平均直径 /
- 均匀度分布指数 /
- 激光粒度分析仪
Abstract: An experimental study on spray characteristics of a typical periodic air-assist direct injection atomizer was presented.Attention was focused on the effect of a series of parameters (such as duration of fuel injection,space time,duration of air injection and pressure of air) on spray characteristics.The fuel employed was RP-3,and the medium employed was compressed air.Laser particle analyzer was employed for spray measurement.Duration of fuel injection,space time and duration of air injection was changed from 2ms to 8ms,-2ms to 5ms,and 2ms to 8ms,respectively.The range of air pressure provided was 0.1～0.65MPa .The results show that the performance of atomization is improved as the ratio of air and fuel is increased.The increase of air density and space time is also benificial for atomization.Additionally,the distribution uniformity index value may be greater while the range of drop-size spreads more widely and the mean diameter is higher.For condition of high pressure,mean drop size is correlated using empirical equations.
- periodic air-assist direct injection atomizer /
- spray characteristics /
- Sauter mean diameter /
- distribution uniformity index /
- laser particle analyzer

HTML

参考文献(15)

[1]	Cathcart G,Dickson G,Ahern S.The application of air-assist direct injection for spark-ignited heavy fuel 2-stroke and 4-stroke engines[R].SAE Paper,2005-32-0065,2005.
[2]	尚秀镜,江俊峰,张建昭,等.汽油机缸内直喷的关键技术和发展现状[J].汽车技术,2001,3:7-10.
[3]	Coplin N.Simplification of air assisted direct injection via performance benchmarking[R].SAE Paper,1999-01-3310, 1999.
[4]	Cathcart G,Tubb J.Application of air assisted direct fuel injection to pressure charged gasoline engine[R].SAE Paper,2002-01-0705,2002.
[5]	Boretti A A,Jin S H,Zakis G.Experimental and numerical study of an air assisted fuel injector for a D.I.S.I.engine[R].SAE Paper,2007-01-1415,2007.
[6]	Brewster S.Initial development of a turbo charged direct injection E100 combustion system[R].SAE Paper,2007-01-3625,2007.
[7]	谢昆.以煤油为燃料的内燃机气助雾化喷嘴方案研究[R].南京:南京航空航天大学,2008. XIE Kun.The design of air assist atomizer for kerosene internal-combustion engine[R].Nanjing:Nanjing University of Aeronautics and Astronautics,2008.(in Chinese)
[8]	甘晓华.航空燃气轮机燃油喷嘴技术[M].北京:国防工业出版社,2006.
[9]	《航空发动机设计手册》总编委会.航空发动机设计手册第 9册:主燃烧室[M].北京:航空工业出版社,2000:185-217.
[10]	Rizk N K,Lefebvre A H.Drop-size distribution characteristics for spill-return atomizers[J].AIAA Journal Propulsion and Power,1985,1(1):16-22.
[11]	Wang X F,Lefebvre A H.Mean drop size form pressure-swirl nozzles[J].AIAA Journal Propulsion and Power,1987,3(1):11-18.
[12]	Rosin P,Rammler E.The laws governing the fineness of powdered coal[J].J Inst.Fuel,1933,7(31):29-36.
[13]	Lefbvre A H.Atomization and sprays[M].New York,USA:Hemisphere Publishing Corporation,1989.
[14]	Lefebvre A H.Gas turbine combustion[M].New York,USA:Hemisphere Publishing Corporation,1983.
[15]	Hendricks R C,Ryder R C,Brankovic A,et al.Computational parametric study of fuel distribution in an experimental trapped vortex combustor sector rig[R].ASME Paper GT2004-53225,2004.