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Effects of injection parameters on the spray characteristics of swirl and slit injectors using the Mie-scattering method

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Abstract

We investigated the effects of injection parameters such as injection pressure, ambient pressure, and ambient temperature on spray characteristics. We calculated the turbulence occurring point (t c ), defined as the time required to generate a vortex, and the deceleration point (t b ), defined as the time when spray penetration begins to decelerate, to elucidate the breakup mechanism of the test injectors. The spray velocity coefficient (Cv) was obtained to evaluate the spray characteristics. As the ambient pressure increases in the case of a slit injector, Cv decreases. We investigated the effects of nozzle tip shape according to injection pressure, ambient pressure, and fuel properties on spray characteristics and provide a Cv value of 0.38 for the swirl injector with a spray angle of 60° and the slit injector under atmospheric conditions. The value of Cv in the case of a slit injector was reduced by increasing the ambient pressure. Our results suggest that Cv of a swirl injector is constant regardless of changes in ambient pressure, injection pressure, and fuel properties. On the other hand, Cv of a slit injector is altered by changes in ambient pressure.

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Abbreviations

t b :

deceleration point [msec]

t c :

turbulent occurring point [msec]

S:

spray penetration [mm]

V b :

penetration velocity before breakup [m/s]

t:

time after injection start [msec]

P inj :

injection pressure [MPa]

P a :

ambient pressure [MPa]

T a :

ambient temperature [K]

V inj :

injection velocity [m/s]

ΔP :

injection pressure difference [MPa]

ρ f :

density of liquid fuel [kg/m3]

Cv :

velocity coefficient

References

  • Fujimoto, H., Kusano, S. and Senda, J. (1997). Distribution of vapor concentration in a diesel spray impinging on a flat wall by means of exciplex fluorescence method — In case of high injection pressure. SAE Paper No. 9702916, 133–144.

  • Hiroyasu, H. and Ari, M. (1980). Fuel spray penetration and spray angle in diesel. Trans. JSAE, 21, 5–11 (in jananess).

    Google Scholar 

  • Lee, C. H. and Lee, K. H. (2003). New technology of the mixture formation for the spark ignited direct injection gasoline engine. J. Korean Society of Automotive Engineers 25,6, 21–28.

    Google Scholar 

  • Lee, C. S., Chon, M. S. and Park, Y. C. (2001). Spray structure of high pressure gasoline injector in a gasoline direct injection engine. Int. J. Automotive Technology 2,4, 165–170.

    Google Scholar 

  • Melton, L. A. (1983). Spectrally separated fluorescence emissions for diesel fuel droplets and vapor. Applied Optics, 22, 2620–2624.

    Article  Google Scholar 

  • Melton, L. A. and Verdieck, J. F. (1984). Vapor/liquid visualization in fuel sprays. 20th Int. Symp. Combustion (Combustion Institute), 1283–1290.

  • Senda, J., Kanda, T., Kobayashi, M. and Fujimoto, H. (1997). Quantitative analysis of fuel vapor concentration in diesel spray by exciplex fluorescence method. SAE Paper No. 970796, 1012–1024.

  • Shelby, M. H., van der Wege, B. A. and Hochgreb, S. (1998). Early spray development in gasoline direct-injected spark ignition engines. SAE Paper No. 980160, 67–84.

  • Tanaka, Y., Takano, T., Sami, H., Sakai, K. and Osumi, N. (2003). Analysis on behavior of swirl nozzle spray and slit nozzle spray in correlation to DI gasoline combustion. SAE Paper No. 2003-01-0058, 1–20.

  • Yamauchi, T. and Wakisaka, T. (1996). Computation of the hollow-cone sprays from a high-pressure swirl injector for a gasoline direct-injection SI engine. SAE Paper No. 962016.

  • Zhao, F.-Q., Lai, M.-C. and Harrington, D. L. (1996). A review mixture preparation and combustion control strategies for spark-ignition direct-injection gasoline engines. Progress in Tech., 91, 21–64.

    Google Scholar 

  • Zhao, F.-Q., Yoo, J.-H. and Lai, M.-C. (1996). Spray dynamics of high pressure fuel injectors for DI gasoline engines. SAE Paper No. 961925, 1924–1953.

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Correspondence to K. H. Lee.

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Lee, C.H., Lee, K.H. & Lim, K.B. Effects of injection parameters on the spray characteristics of swirl and slit injectors using the Mie-scattering method. Int.J Automot. Technol. 11, 435–440 (2010). https://doi.org/10.1007/s12239-010-0053-x

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  • DOI: https://doi.org/10.1007/s12239-010-0053-x

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