Numerical Simulation of Spray Process of Fuel Nozzle

Abstract:

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Control of exhaust emission and combustion efficiency depend directly on the atomization of the liquid. The research on the atomizing performance of fuel nozzle is certainly important. A model using VOF-LES method has been built to investigate sheet breakup behavior of the main circuit of a pressure swirl atomizer. LES which takes into account of turbulence of fuel and air, has been used to simulate the phenomenon of sheet breakup. Vivid gas-liquid interface, instability wave and primary breakup phenomenon have been captured. The patterns of the sheet breaking-up change with different fuel flux. The mechanism of sheet breakup has been analyzed by combining variations of velocity and turbulent kinetic energy with Kelvin-Helmholtz instability theory and turbulence on circumference. The breakup length captured by simulation agrees well with the results of the semi-empirical formulas.

Info:

Periodical:

Advanced Materials Research (Volumes 308-310)

Edited by:

Jian Gao

Pages:

47-52

DOI:

10.4028/www.scientific.net/AMR.308-310.47

Citation:

R. S. Xu et al., "Numerical Simulation of Spray Process of Fuel Nozzle", Advanced Materials Research, Vols. 308-310, pp. 47-52, 2011

Online since:

August 2011

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Price:

$35.00

[1] S. M. Jeng, M. A. Jog. Computational and Experimental Study of Liquid Sheet Emanating from Simplex Fuel Nozzle[J]. AIAA, 1998. Vol. 36. No. 2: 207-214.

DOI: 10.2514/3.13799

[2] B.Befrui, etal. LES Simulation of the Internal Flow and Near-Field Spray Structure of an Outward-Opening GDI Injector and Comparison with Imaging Data[J], SAE TECHNICAL PAPER SERIES, 2008-1.

DOI: 10.4271/2008-01-0137

[3] Lei ZHOU, Maozhao XIE, Ming JIA. Application of Large Eddy Simulation to a Diesel Spray [J]. Transactions of CSICE, Vol. 27, No. 3, 2009: 202-206. In Chinese.

[4] Defu CHE, Huixiong LI. Multiphase Flow and Its Applications [M]. Xi'an: XI'AN JIAOTONG UNIVERSITY PRESS, 2007, 11: 505-569. In Chinese.

[5] Jun CHEN. Investigation on Atomization Quality Experiment of Aeroengine Fuel Nozzle and Numerical Simulation of the Dome of the Flame Tube [D]. Shenyang: Shenyang Institute of Aeronautical Engineering, 2007: 37-42. In Chinese.

[6] S. P. Lin. Breakup of Liquid Sheets and Jets[J]. International Journal of Auomotive Technology, Vol. 3, No. 2: 83-91.

[7] Han Z, et al. Modeling Atomization Processes of Pressure-Swirl-Hollow Cone Fuel Spray [J]. Atomization and Sprays, 1997-7: 663-684.

DOI: 10.1615/atomizspr.v7.i6.70

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