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An experimental study on the spray characteristics of a dual-orifice type swirl injector at low fuel temperatures

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Abstract

The objective of this study is to investigate the effects of fuel temperature on the spray characteristics of a dual-orifice type swirl injector used in a gas turbine. The major parameters affecting spray characteristics are fuel temperature and injection pressure entering into the injector. In this study, the spray characteristics of a dual-orifice type swirl injector are investigated by varying fuel temperature from — 30°C to 120°C and injection pressure from 0.29 to 0.69 MPa. Two kinds of fuel having different surface tension and viscosity are chosen as atomizing fluids. As a result, injection instability occurs in the low fuel temperature range due to icing phenomenon and fuel property change with a decrease of fuel temperature. As the injection pressure increases, the range of kinematic viscosity for stable atomization becomes wider. The properties controlling the SMD of spray is substantially different according to the fuel temperature range.

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Abbreviations

D :

Droplet diameter

L :

Left side in patternator

N :

Rosin-Rammler distribution parameter

Q :

Volume fraction

R :

Right side in patternator

X :

Rosin-Rammler size parameter

y :

Liquid volume in mass cylinder

φ:

Equivalent spray angle

θ:

Angle from the center of a nozzle to a bin in patternator

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Authors and Affiliations

  1. Graduate School of Mechanical Engineering, Korea University, 1, 5-ka, Anam-dong, Sungbuk-ku, 136-701, Seoul, Korea

    Byung Sung Park

  2. Department of Mechanical Engineering, Korea University, 1, 5-ka, Anam-dong, Sungbuk-ku, 136-701, Seoul, Korea

    Ho Young Kim, Yongchan Kim & Jin Taek Chung

Authors
  1. Byung Sung Park
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  2. Ho Young Kim
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  3. Yongchan Kim
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  4. Jin Taek Chung
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Correspondence to Ho Young Kim.

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Park, B.S., Kim, H.Y., Kim, Y. et al. An experimental study on the spray characteristics of a dual-orifice type swirl injector at low fuel temperatures. KSME International Journal 18, 1187–1195 (2004). https://doi.org/10.1007/BF02983293

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  • DOI: https://doi.org/10.1007/BF02983293

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