In this paper a quasi-direct solution of transient three-dimensional CFD calculations based on a finite volume approach has been adopted to simulate the atomization process of high velocity liquid jets issuing an injector-like nozzle. An accurate Volume-of-Fluid (VOF) method is used to reconstruct and advect the interface between the liquid and gas phases. An extended mesh which includes the injector nozzle and the upstream plenum has been considered in order to investigate accurately the effect of nozzle flow conditions on the liquid jet atomization. Cavitation modeling has not been included in the present computations. Two different mean injection velocities, 150 m/s and 270 m/s, respectively, have been considered in the calculations as representative of semi-turbulent and fully-turbulent nozzle flow conditions. The liquid-to-gas density ratio is kept fixed at 57. The calculations show that atomisation is directly linked to the temporally and spatially correlated turbulence of the liquid jet. The bulk flow perturbation and the relaxation of the boundary layer have been found to be the basic mechanisms that generate surface perturbations of the liquid jet.
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ASME 2005 Internal Combustion Engine Division Spring Technical Conference
April 5–7, 2005
Chicago, Illinois, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
0-7918-4184-7
PROCEEDINGS PAPER
A Quasi-Direct 3D Simulation of the Atomization of High-Speed Liquid Jets
Gian Marco Bianchi,
Gian Marco Bianchi
University of Bologna, Bologna, Italy
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Piero Pelloni,
Piero Pelloni
University of Bologna, Bologna, Italy
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Stefano Toninel,
Stefano Toninel
University of Bologna, Bologna, Italy
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Ruben Scardovelli,
Ruben Scardovelli
University of Bologna, Bologna, Italy
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Anthony Leboissetier,
Anthony Leboissetier
LMM-UPMC, Paris VI, France
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Stephan Zaleski
Stephan Zaleski
LMM-UPMC, Paris VI, France
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Gian Marco Bianchi
University of Bologna, Bologna, Italy
Piero Pelloni
University of Bologna, Bologna, Italy
Stefano Toninel
University of Bologna, Bologna, Italy
Ruben Scardovelli
University of Bologna, Bologna, Italy
Anthony Leboissetier
LMM-UPMC, Paris VI, France
Stephan Zaleski
LMM-UPMC, Paris VI, France
Paper No:
ICES2005-1067, pp. 295-306; 12 pages
Published Online:
November 11, 2008
Citation
Bianchi, GM, Pelloni, P, Toninel, S, Scardovelli, R, Leboissetier, A, & Zaleski, S. "A Quasi-Direct 3D Simulation of the Atomization of High-Speed Liquid Jets." Proceedings of the ASME 2005 Internal Combustion Engine Division Spring Technical Conference. ASME 2005 Internal Combustion Engine Division Spring Technical Conference. Chicago, Illinois, USA. April 5–7, 2005. pp. 295-306. ASME. https://doi.org/10.1115/ICES2005-1067
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