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Optimization study on pin tip diameter of an impact-pin nozzle at high pressure ratio

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Abstract

Wet compression system is typically installed in a gas turbine engine to increase the net power output and efficiency. A crucial component of the wet compression system is the nozzle which generates fine water droplets for injection into the compressor. The main objective of present work is to optimize a kind of nozzle called impact-pin spray nozzle and thereby produce better quality droplets. To achieve this, the dynamics occurring in the water jet impinging on the pin tip, the subsequent formation of water sheet, which finally breaks into water droplets, must be studied. In this manuscript, the progress on the numerical studies on impact-pin nozzle are reported. A small computational domain covering the orifice, pin tip and the region where primary atomization occurs is selected for numerical analysis. The governing equations are selected in three dimensional cartesian form and simulations are performed to predict the dynamics of water jet impinging on the pin. Systematic studies were carried out and the results leading to the choice of turbulence model and the effect of pin tip diameter are reported here. Further studies are proposed to show the future directions of the present research work.

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Authors and Affiliations

  1. FMTRC, Daejoo Machinery Co. Ltd., Daegu, 704-833, Korea

    C. Palani Kumar & Kwon Hee Lee

  2. Engine Components Research Team, Korea Aerospace Research Institute, Daejoo, Korea

    Tae Choon Park & Bong Jun Cha

  3. Department of Mechanical Engineering, Andong National University, Andong, 760-749, Korea

    Heuy Dong Kim

Authors
  1. C. Palani Kumar
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  2. Kwon Hee Lee
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  3. Tae Choon Park
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  4. Bong Jun Cha
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  5. Heuy Dong Kim
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Corresponding author

Correspondence to Heuy Dong Kim.

Additional information

Recommended by Guest Editor Gihun Son and Hyoung-Gwon Choi

Heuy-Dong Kim received his B.S. and M.S. degrees in Mechanical Engineering from Kyungpook National University, Korea, in 1986 and 1988, respectively. He then received his Ph.D. from Kyushu University, Japan, in 1991. Dr. Kim is currently a Professor at the School of Mechanical Engineering, Andong National University, Korea. His research interests include high-speed trains, ramjet and scramjet, shock tube and technology, shock wave dynamics, explosions and blast waves, flow measurement, aerodynamic Noises and Supersonic Wind Tunnels.

C. Palani Kumar obtained his B.E. in Mechanical Engineering from Bharathiar University, Coimbatore, India and his Ph.D. degree in Aerospace Engineering from Indian Institute of Technology Madras, India. He is currently working as Visiting Scientist (R&D) at FMTRC, Daejoo Machinery Co. Ltd., Korea. His research interests include multiphase CFD, gas turbine technologies, propulsion and computational combustion.

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Kumar, C.P., Lee, K.H., Park, T.C. et al. Optimization study on pin tip diameter of an impact-pin nozzle at high pressure ratio. J Mech Sci Technol 30, 4001–4006 (2016). https://doi.org/10.1007/s12206-016-0812-3

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  • DOI: https://doi.org/10.1007/s12206-016-0812-3

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