This content is not included in your SAE MOBILUS subscription, or you are not logged in.
An Analysis of Droplets and Ambient Air Interaction in a D.I. Gasoline Spray Using LIF-PIV Technique
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
Annotation ability available
Measurements of the droplet and ambient air velocities in and around a D.I. gasoline spray were made by combining the laser induced fluorescence (LIF) and the particle image velocimetry (PIV) techniques. Before the fuel spray was injected into a constant volume vessel, rhodamine B-water solution was injected into the ambient air by a swirl-type injector for dispersing the fine fluorescent liquid particles as tracers for the ambient air motion. The fuel spray was injected into the fluorescent tracer clouds by a D.I. gasoline injector and was illuminated by an Nd:YAG laser light sheet (wave length: 532 nm). The light scattered by the droplets in the fuel spray was the same as the Nd:YAG laser wavelength, whereas the light emitted by the fluorescent tracer clouds was at a longer wavelength. The light emitted by the fluorescent tracer clouds was discriminated from the light scattered by the droplets in the fuel spray by an optical high pass filter (>560 nm), and the succeeding two images were captured by using a high-resolution CCD camera. The images acquired were analyzed by the double frame cross-correlation PIV technique, and the droplets and ambient air velocity distributions were obtained. The ambient air velocity distributions by the fluorescent tracer clouds were compared with those by the microballoon tracers to evaluate the tracking ability of the tracers to the ambient air motion. In comparisons of two tracers, similar velocity distributions were observed around the spray. A clear counter-rotating vortex was formed at the periphery of the spray under atmospheric pressure, whereas, at high ambient pressure, a vortex-like structure built up at the periphery of the spray was not vortex motion but the spray flowing up due to increased resistance to the still air and the decreased ambient air motion. The ambient air motion was the large-scale bulk motion symmetric to the spray axis, and it induced the entrainment of ambient air into the spray. The relative velocity between the spray and ambient air was high near the leading edge and at the axis of the spray.
CitationLee, J., Yamakawa, M., Isshiki, S., and Nishida, K., "An Analysis of Droplets and Ambient Air Interaction in a D.I. Gasoline Spray Using LIF-PIV Technique," SAE Technical Paper 2002-01-0743, 2002, https://doi.org/10.4271/2002-01-0743.
- Kume, T. Iwamoto, Y. Iida, K. Murakami, M. Akishino, K. Ando, H. “Combustion Control Technologies for Direct Injection SI Engine,” SAE Paper No. 960600 1996
- Tamura, Y. Kikuchi, S. Okada, K. Koga, K. Dogahara, T. Nakayama, O. Ando, H. “Development of Advanced Emission-Control Technologies for Gasoline Direct-Injection Engines,” SAE Paper, No. 2001-01-0254 2001
- Ando, H. Kuwahara, K. “A Keynote on Future Combustion Engines,” SAE Paper, No. 2001-01-0248 2001
- Nakashima, T. Saito, K. Basaki, M, Furuno, S. “A Study of Stratified Charge Combustion Characteristics in New Concept Direct Injection SI Gasoline Engine,” SAE Paper, No. 2001-01-0734
- Nomura, Y. Miyagawa, H. Fujikawa, T. Tomoda, T. Kubota, M Abe, S. “Numerical Study of Mixture Formation and Combustion Processes in a Direct Injection Gasoline Engine with Fan-Shaped Spray,” SAE Paper, No. 2001-01-0738
- Stan, C. Tröger, R. Grimaldi, C.N. Postrioti, L. “Direct Injection of Variable Gasoline/Methanol Mixtures: Injection and Spray Characteristics,” SAE Paper, No. 2001-01-0966
- Zhao, F.-Q. Yoo, J.H. Liu, Y. Lai M.-C. “Spray Dynamics of High Pressure Fuel Injectors for DI Gasoline Engines,” SAE, Paper, No. 961925 1996
- Yamakawa, M. Isshiki, S. Lee, J.K. Nishida, K. “3-D PIV Analysis of Structural Behavior of D.I. Gasoline Spray,” SAE Paper, No. 2001-01-3669
- Yue, Y. Powell, C.F. Poola, R. Wang, J. Lai, M-C. Parrish S.E “Quantitative Measurements of Direct-Injection Gasoline Fuel Sprays in Near-Nozzle Region Using Synchrotron X-Ray,” SAE Paper, No. 2001-01-1293 2001
- Josefsson, G. Fischer, J. Magnusson, I. “Length Scale Measurements in an Engine Using PIV and Comparison with LDV,” The Fifth International Symposium on Diagnostics and Modeling of Combustion Engines (COMMODIA 2001) July 1-4 2001 Nagoya, Japan
- Araneo, L. Coghe, A. Brunello, G. Dondé, R. “Effects of Fuel Temperature and Ambient Pressure on a GDI Swirled Injector Spray,” SAE Paper, No. 2000-01-1901 2000
- Faure, M.A. Sadler, M Oversby, K.K. Stokes, J. Begg, S.M. Pommier, L.S. Heikal, M.R. “Application of LDA and PIV Techniques to the Validation of a CFD Model of a Direct Injection Gasoline Engine,” SAE Paper, No. 982705 1998
- Yeh, C-N. Kosaka, H. Kamimoto, T. “A Fluorescence/Scattering Imaging Technique for Instantaneous 2-D Measurement of Particle Size Distribution in a Transient Spray,” The Third International Congress on Optical Particle Sizing August 23-26 1993 Yokohama, Japan
- Preussner, C. Döring, C. Fehler, S. Kampmann, S. “GDI: Interaction Between Mixture Preparation, Combustion System and Injection Performance,” SAE Paper, No. 980498 1998
- Yamakawa, M. Isshiki, S. Lee, J.K. Nishida, K. “Droplet and Ambient Air Velocity Measurement of D.I. Gasoline Spray by LIF-PIV Technique,” Proceedings of ILASS-Asia 2001 Oct. 11-13 2001 Busan, Korea
- Fuchs, N.A. The Mechanics of Aerosols Pergamon Press Oxford 70 74 1964