Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Analysis and Numerical Modeling Using LISA-DDB Hybrid Breakup Model of Direct Injected Gasoline Spray

  • Published : 2003.11.01
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Abstract

This paper presents the effect of injection pressure on the atomization characteristics of high-pressure injector in a direct injection gasoline engine both experimentally and numerically. The atomization characteristics such as mean droplet size, mean velocity, and velocity distribution were measured by phase Doppler particle analyzer. The spray development, spray penetration, and global spray structure were visualized using a laser sheet method. In order to investigate the atomization process in more detail, the calculations with the LISA-DDB hybrid model were performed. The results provide the effect of injection pressure on the macroscopic and microscopic behaviors such as spray development, spray penetration, mean droplet size, and mean velocity distribution. It is revealed that the accuracy of prediction is promoted by using the LISA-DDB hybrid breakup model, comparing to the original LISA model or TAB model alone. And the characteristics of the primary and secondary breakups have been investigated by numerical approach.

Keywords

References

  1. Dombrowski, N. and Johns, W. R., 1963, 'The Aerodynamic Instability and Disintegration of Viscous Liquid Sheets,' Chem. Eng. Sci., Vol. 18, pp. 203-214 https://doi.org/10.1016/0009-2509(63)85005-8
  2. Hwang, S. S., Liu, Z. and Reitz, R. D., 1996, 'Breakup Mechanisms and Drag Coefficients of High-Speed Vaporizing Liquid Drops,' Atomization and Sprays, Vol. 6, pp. 353-376 https://doi.org/10.1615/AtomizSpr.v6.i3.60
  3. Ibrahim, E. A., Yang, H. Q. and Przekwas, A. J., 1993, 'Modeling of Spray Droplets Deformation and Breakup,' AIAA J. Propulsion and Power, Vol. 9, No. 4, pp. 652-654
  4. Kim, J. I., No, S. Y., Kim, J. O. and Lim, J. H., 1999, 'Modeling Capability of Various Atomization and Droplet Breakup Models for DI Diesel Engines,' The Eighth Symposium (ILASSJapan) on Atomization, Osaka, Japan, pp. 149-154
  5. Lee, C. S., Chon, M. S. and Park, Y. C., 2001, 'Spray Structure of High-Pressure Gasoline Injectors in a Gasoline Direct-Injection Engine,' International Journal of Automotive Technology, Vol. 2, No. 4, pp. 165-170
  6. Li, S. C. and Gebert, K., 1998, 'Spray Characterization of High Pressure Gasoline Injectors with Swirl and Non-Swirl Nozzles,' SAE paper, 981935
  7. O'Rourke, P. J. and Amsden, A. A., 1987, 'The tab Method for Numerical Calculation of Spray Droplet Breakup,' SAE paper, 872089
  8. Park, S. W., Kim, H. J. and Lee, C. S., 2003, 'Numerical and Experimental Analysis of Spray Atomization Characteristics of a GDI Injector,' KSME International Journal, Vol. 17, No. 3, pp. 449-456
  9. Reitz, R. D., 1987, 'Modeling Atomization Processes in High-Pressure Vaporizing Sprays,' Atomisation and Spray Technology, Vol. 3, pp. 309-357
  10. Schmidt, D. P., Nouar, I., Senecal, P. K., Rutland, J. K. and Reitz, R. D., 1999, 'Pressure-Swirl Atomization in the Near Field,' SAE paper, 1999-01-0496
  11. Senecal, P. K., Schmidt, D. P., Nouar, I., Rutland, J. K. and Reitz, R. D., 1999, 'Modeling High-Speed Viscous Liquid Sheet Atomization,' International Journal of Multiphase Flow, Vol. 25, pp. 1073-1097 https://doi.org/10.1016/S0301-9322(99)00057-9