Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Spray Structures and Vaporizing Characteristics of a GDI Fuel Spray

  • Park, Dong-Seok (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Gyung-Min (Department of Mechanical Engineering, Osaka University) ;
  • Kim, Duck-Jool (School of Mechanical Engineering, Pusan National University)
  • Published : 2002.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

The spray structures and distribution characteristics of liquid and vapor phases in non-evaporating and evaporating Gasoline Direct Injection (GDI) fuel sprays were investigated using Laser Induced Exciplex Fluorescence (LIEF) technique. Dopants were 2% fluorobenzene and 9% DEMA (diethyl-methyl-amine) in 89% solution of hexane by volume. In order to study internal structure of the spray, droplet size and velocity under non-evaporating condition were measured by Phase Doppler Anemometry (PDA). Liquid and vapor phases were visualized at different moments after the start of injection. Experimental results showed that the spray could be divided into two regions by the fluorescence intensity of liquid phase: cone and mixing regions. Moreover, vortex flow of vapor phase was found in the mixing region. About 5㎛ diameter droplets were mostly distributed in the vortex flow region. Higher concentration of vapor phase due to vaporization of these droplets was distributed in this region. Particularly, higher concentration of vapor phase and lower one were balanced within the measurement area at 2ms after the start of injection.

Keywords

References

  1. Choi, D., Kim, D. and Hwang, S., 2000, 'Development Behavior of Vaporizing Sprays from a High-Pressure Swirl Injector using Exciplex Fluorescence Method,' KSME International Journal, Vol. 14, No. 10, pp. 1143-1150 https://doi.org/10.1007/BF03185068
  2. Choi, D. and Kim, D., 2001, 'Vaporizing Characteristics of Spray from Two Different GDI Injectors,' Tran. of the KSME, B, Vol. 25, No. 5, pp. 688-696, (in Korean)
  3. Eichlseder, H., Baumann, E., Muller, P. and Rubber, S., 2000, 'Gasoline Direct Injection-A Promising Engine Concept for Future Demands,' SAE paper, No. 2000-01-0248
  4. Evers, L. W., 1994, 'Characterization of the Transient Spray from a High Pressure Swirl Injector,' SAE paper, No. 940188
  5. Han, Z. and Reitz, R. D., 1997, 'Internal Structure of Vaporizing Pressure-Swirl Fuel Sprays,' Proc. ICLASS-97, pp. 474-481
  6. Ipp, W., Wagner, V., Kr mer, H., Wensing, M., Leipertz, A., Arndt, S. and Jain, A. K., 1999, 'Spray Formation of High Pressure Swirl Gasoline Injectors Investigated by Two-Dimensional Mie and LIEF Techniques,' SAE paper, No. 1999-01-0498
  7. Iwamoto, Y., Noma, K., Nakayama, O., Yamauchi, T. and Ando, H., 1997, 'Development of Gasoline Direct Injection Engine,' SAE paper, No. 970541
  8. Miyajima, A., Okamoto, Y., Kadomukai, Y., Togashi, S. and Kashiwaya, M., 2000, 'A Study on Fuel Spray Pattern Control of Fuel Injector of Gasoline Direct Injection Engines,' SAE paper, No. 2000-01-1045
  9. Preussner, C., Doring, C., Fehler, S. and Kampmann, S., 'GDI: Interaction Between Mixture Preparation, Combustion System and Injector Performance,' SAE paper, No. 980498
  10. Senda, J., Kanda, T., Kobayashi, M., Fujimoto, H., 1997, 'Quantitative Analysis of Fuel Vapor Concentration in Diesel Spray by Exciplex Fluorescence Method,' SAE paper, No. 970796
  11. Wicker, R. B., Loya, H. I., Hutchison, P. A. and Sakakibara, J., 1999, 'SIDI Fuel Spray Structure Investigation Using Flow Visualization and Digital Particle Image Velocimetry,' SAE paper, No. 1999-01-3535
  12. Yeh, C., Kamimoto, T., Kosaka, H. and Kobori, S., 1994, 'Quantitative Measurement of 2-D Fuel Vapor Concentration in a Transient Spray via Laser-Induced Fluorescence Technique,' SAE paper, No. 941953
  13. Zhao, F., Lai, M. and Harrington, D. L., 1999, 'Automotive Spark-Ignited Direct-Injection Gasoline Engiens,' Progress in Energy and Combustion Science, Vol. 25, pp. 437-562 https://doi.org/10.1016/S0360-1285(99)00004-0