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Design and Prototyping Micro Centrifugal Compressor for Ultra Micro Gas Turbine

Hirano, Toshiyuki    (Production Systems Engineering Course, Tokyo Metropolitan College of Industrial Technology   ); Tsujita, Hoshio    (Department of Mechanical Engineering, Hosei University   ); Gu, Ronglei    (Department of Mechanical Engineering, Hosei University   ); Minorikawa, Gaku    (Department of Mechanical Engineering, Hosei University  );
  • 초록

    In order to investigate the design method for a micro centrifugal compressor, which is the most important component of an ultra micro gas turbine, an impeller having the outer diameter of 20mm was designed, manufactured and tested. The designed rotational speed is 500,000 rpm and the impeller has a fully 3-dimensional shape. The impeller was rotated at 250,000 rpm in the present study. The experimental results of the tested compressor with the vaned and the vaneless diffusers were compared. It was found that the vaned diffuser attained the higher flow rate than the vaneless diffuser at the maximum pressure ratio. In addition the maximum pressure ratio was higher for the diffuser having a larger diffuser divergence angle at the high flow rate. These results were compared with those obtained by the prediction method used at the design stage.


  • 주제어

    Centrifugal Compressor .   Performance Characteristics .   3-dimensional Impeller .   Prediction method.  

  • 참고문헌 (11)

    1. A. H. Epstein, et al., 1997, “Micro-Heat Engine and Rocket Engines, -The MIT Microengine Project-,” AIAA Paper, 97-1773. 
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    3. E. Matsuo, H. Yoshiki, T. Nagashima and C. Kato, 2003, “Towards the Development of Finger-Top Gas Turbines,” IGTC Tokyo OS-103. 
    4. Y. Gong, B. T. Sirakov, A. H. Epstein, C. S. Tan, 2004, “Aerothermodynamics of Micro-Turbomachinery,” ASME Turbo Expo 2004 GT2004-53877,Vienna, Austria. 
    5. J.P. Johnston, S. Kamg, T. Arima, M. Matsunaga, H.Tsuru and F. B. Prinz, 2003, “Performance of a Micro-scale Radial-Flow Compressor Impeller made of Silicon Nitride,” IGTC Tokyo OS-110. 
    6. S. Ashley, 1997, “Turbine on a Dime,” Mechanical Engineering, Vol. 119, No. 10. 
    7. Special Issue of Micro Gas Turbine, Journal of GTSJ, Vol. 29, No. 3 pp. 122-159. 
    8. S. Tanaka, K. Isomura, T. Kato, F. Sato, M. Oike, T. Genda, M. Hara, T. Kamatsuchi, S. Sugimoto, J. F. Li, H. Yamaguchi, N. Ijichi, M. Murayama, K. Nakahashi and M Esashi, 2002, “Design and Fabrication Challenges for Micromachined Gas Turbine Generators,” 9th ISROMAC, Honolulu, Hawaii. 
    9. K. Isomura, M. Murayama, H. Yamaguchi, N. Ijichi, H. Asakura, N. Saji, O. Shiga, K. Takahashi, T. Kawakubo, T. Watanabe, A. Yamagata, S. Tanaka, T. Genda and M Esashi, 2002, “Design Study of a Macromachined Gas Turbine with 3-Dimensional impeller,” 9th ISROMAC, Honolulu, Hawaii. 
    10. T. Hirano, N. Yamaguchi, G. Minorikawa, H. Tsujita and S. Mizuki, 2005, “Design and Prototyping of Micro Centrifugal Compressor for Ultra Micro Gas Turbine,” 7th ISAIF, Vol. 1, pp. 71-76. 
    11. M. R. Galvas, 1972, “Analytical Correlation of Centrifugal Compressor Design Geometry for Maximum Efficiency with Specific Speed,” NASA TN D6729. 

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