Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Vaporizing Characteristics of Spray from Two Different GDI Injectors

분무각이 다른 GDI인젝터에 대한 증발특성

  • Published : 2001.05.01
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Abstract

Vaporizing characteristics of two GDI injectors with different spray angles were investigated using exciplex fluorescence method. Injector I has narrower spray angle, while injector II has wider one. The exciplex system of fluorobenzene and DEMA in a non-fluorescing base fuel of hexane was employed. In quantifying concentration of fuel vapor, quenching of concentration and temperature was corrected. Droplet size and velocity were also measured by PDPA under non-vaporizing condition. From obtaining the images of liquid and vapor phases, vaporizing GDI sprays could be divided as two regions: cone and mixing regions. For injector I, vortex region was not developed. High concentration of fuel vapor due to vaporization of many fine droplets was distributed near the spray axis. For injector II, droplets with the diameter of about 10 $\mu$m were distributed in the vortex region. The vortex region had high concentration of fuel vapor due to vaporization of these droplets. Particularly, higher and lower concentrations of fuel vapor were balanced at 2ms after the start of injection for injector II.

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References

  1. Lefevre, A. H., 1989, Atomization and Sprays, Hemisphere Publishing
  2. Kume, T., Iwamoto, Y., Iida, K., Murakami, M., Akishino, K., and Ando, H., 1996, 'Combusition Control technologies for Direct Injection SI Engines,' SAE Paper, No. 960600
  3. Dodge, L. G., 1996, 'Fuel Preparation Requirements for Direct-Injected Spark-Ignition Engines,' SAE Paper, No. 962015
  4. Zhao, F., Lai, M. -C. and Harrington, D. L., 1999, 'Automotive Spark-Ignited Direct-Injection Gasoline Engines,' Prowess in Energy and Combustion Science, Vol. 25, No.5, pp. 437-562 https://doi.org/10.1016/S0360-1285(99)00004-0
  5. Evers, L. W., ]993, 'Characterization of the Transient Spray from a High Pressure Swirl Injector,' SAE Paper, No. 940188
  6. Naitoh, K. and Takagi, Y., 1997, 'Synthesized Spheroid Particle(SSP) Method for Calculating Spray Phenomena in Direct-Injection SI Engines,' SAE Paper, No. 962017
  7. Preussner, C.; Doring, C., Fehler, S. and Kampmann, S., 1998, 'GDI: Interaction Between Mixture Preparation, Combustion System and Injector Performance,' SAE Paper, No. 980498, pp. 147-164
  8. 최동석, 류경훈, 차건동, 김덕줄, 1999, '와류형 고압 분무의 속도 및 입경분포에 관한 연구,' 대한기계학회논문집(B), Vol. 23, No. 10, pp.1310-1319
  9. 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
  10. Senda, J. Kanda, T., Kobayashi, M. and Fujimoto, B., 1997, 'Quantitative Analysis of Fuel Vapor Concentration in Diesel Spray by Exciplex Fluorescence Method,' SAE Paper, No. 970796
  11. Han, Z. and Reitz, R. D., 1997, 'Internal Structure of Vaporizing Pressure-Swirl Fuel Sprays,' Proc. ICLASS-97, pp. 474-481
  12. Ipp, W., Wagner, V., Kramer, H., Wensing, M. and Leipertz, A., 1999, 'Spray Formation of High Pressure Swirl Gasoline Injectors Investigated by Two-Dimensional Mie and LIEF Techniques,' SAE Paper, No. 1999-01-0498
  13. 황순철, 최동석, 차건종, 김덕줄, 1999, '증발조건에서 직분식 가솔린 분무의 증기농도의 분포,' 한국액체미립학회지, Vol. 4, No.4, pp. 1-8
  14. Parrish, S. E., 1997, 'Spray Characterization in a Motored Direct-Injection Spark-Ignition Engine,' Ph.D thesis, University of Wisconsin-Madison
  15. Yagi, K., Yoshida, Y. and Ohata, T., 1958, Fluorescence(Theory？Measurement？Application), Nankou dou, (in Japanese)