Turbomachinery
Online ISSN : 1880-2338
Print ISSN : 0385-8839
ISSN-L : 0385-8839
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Volume 35, Issue 11
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Technical Papers
  • Design and Prototyping of Centrifugal Compressor for Ultra Micro Gas Turbine
    (The Influence of Scale Effect on the Performance Characteristics)
    Toshiyuki HIRANO, Kousuke TANIDA, Takaaki HAGIWARA, Ronglei GU, Gaku M ...
    2007 Volume 35 Issue 11 Pages 696-702
    Published: 2007
    Released on J-STAGE: September 24, 2008
    DOIhttps://doi.org/10.11458/tsj.35.696
    JOURNAL FREE ACCESS
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    Concerning the conceptual design of an ultra micro gas turbine, a compressor with the impeller outer diameter of D2=4mm was investigated at MIT for the feasibility study of an ultra micro gas turbine including manufacturing process. Because the ultra micro centrifugal compressor is one of the most important component of an ultra micro gas turbine unit, a 5 times and a 10 times sizes (D2=20mm and 40mm) for the final target were prototyped and tested in the present study. The similitude for these impellers including the relationship between the rotational speed and the pressure ratio was examined for the experimental results of the 5 times and the 10 times models. As a result, the piping layout downstream of the compressor was proved to affect the performance characteristics of the compressor. The total loss of 5 times model was much larger than that of 10 times model due to the scale effect.
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