ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Atomization and Sprays
インパクトファクター: 1.262 5年インパクトファクター: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684

巻:
巻 29, 2019 巻 28, 2018 巻 27, 2017 巻 26, 2016 巻 25, 2015 巻 24, 2014 巻 23, 2013 巻 22, 2012 巻 21, 2011 巻 20, 2010 巻 19, 2009 巻 18, 2008 巻 17, 2007 巻 16, 2006 巻 15, 2005 巻 14, 2004 巻 13, 2003 巻 12, 2002 巻 11, 2001 巻 10, 2000 巻 9, 1999 巻 8, 1998 巻 7, 1997 巻 6, 1996 巻 5, 1995 巻 4, 1994 巻 3, 1993 巻 2, 1992 巻 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2019028830
pages 957-974

COMPUTATIONAL ANALYSIS OF FLOW PATTERNS IN ELLIPTICAL DIESEL NOZZLES AT HIGH INJECTION PRESSURES

Shenghao Yu
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China
Bifeng Yin
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Weixin Deng
Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute of CARD, Sichuan Mianyang, 621000, China
Hekun Jia
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China
Ze Ye
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China
Bin Xu
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China
Huaping Xu
School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

要約

The use of an elliptical diesel nozzle has been considered as a potential method for improving the air–fuel mixing quality as well as diesel engine performance. The present paper focuses on the internal flow patterns for circular and elliptical orifices with the same cross-sectional area under real diesel engine operating conditions. The Schnerr and Sauer cavitation model and large eddy simulation method were adopted and validated by comparing with experimental results. The results show that the cavitation inside the circular orifice was axisymmetric, while the cavitation inside the elliptical orifice was nonaxisymmetric. Moreover, the circular orifice had a larger vapor volume fraction than that of the elliptical orifices, which indicated that the use of an elliptical orifice could inhibit the generation of cavitation inside the orifice. Also, the number of turbulent vortex structures of the circular orifice was more than that of the elliptical orifices. The turbulent vorticity at the outlet of the elliptical nozzle with an aspect ratio of 1:8 was the largest, and the circular orifice held the smallest turbulent vorticity. Meanwhile, the mass flow rate and discharge coefficient of the elliptical orifice was always higher than that of the circular orifice. The elliptical orifice, with an aspect ratio of 1:4, has the largest discharge coefficient and mass flow rate under the condition of cavitation. Another important point is that the cavitation inception occurred inside the elliptical orifice at a lower cavitation number as compared to the circular orifice. In addition, when the cavitation incepted inside the orifice, the velocity coefficient increases with the decrease of cavitation number, and the velocity coefficient of the circular orifice was always larger than that of the elliptical orifice. The elliptical orifice with an aspect ratio of 1:4 has the maximum area coefficient among three geometrical orifices.


Articles with similar content:

EXPERIMENTAL AND NUMERICAL STUDY OF INTERNAL FLOW AND SPRAY CHARACTERISTICS FOR ELLIPTICAL ORIFICE UNDER TYPICAL DIESEL ENGINE OPERATION CONDITIONS
Atomization and Sprays, Vol.28, 2018, issue 8
Bifeng Yin, Bin Xu, Shenghao Yu, Ze Ye, Huaping Xu, Hekun Jia, Weixin Deng
EFFECT OF INTERNAL FLOW STRUCTURE IN CIRCULAR AND ELLIPTICAL NOZZLES ON SPRAY CHARACTERISTICS
Atomization and Sprays, Vol.21, 2011, issue 8
Choong-Won Lee, Kun Woo Ku, Jung Goo Hong
NUMERICAL INVESTIGATION ON EFFECTS OF ELLIPTICAL DIESEL NOZZLE ON PRIMARY SPRAY CHARACTERISTICS BY LARGE EDDY SIMULATION (LES)
Atomization and Sprays, Vol.28, 2018, issue 8
Bifeng Yin, Bin Xu, Shenghao Yu, Ze Ye, Huaping Xu, Hekun Jia, Weixin Deng
EFFECT OF CAVITATION IN CIRCULAR NOZZLE AND ELLIPTICAL NOZZLES ON THE SPRAY CHARACTERISTIC
Atomization and Sprays, Vol.20, 2010, issue 10
Choong-Won Lee, Sung Ryoul Kim, Kun Woo Ku, Jung Goo Hong
Characteristics of the Internal Flow in a Diesel Injection Nozzle
International Journal of Fluid Mechanics Research, Vol.24, 1997, issue 1-3
Keiya Nishida, Hiroyuki Hiroyasu, J. H. Kim