Design and prototyping of micro centrifugal compressor for ultra micro gas turbine

Shimpei Mizuki*, Toshiyuki Hirano, Yoshiyuki Koizumi, Gaku Minorikawa, Hoshio Tsujita, Mitsuo Iwahara, Ronglei Gu, Yutaka Ohta, Eisuke Outa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In order to establish the design methodology of an ultra micro centrifugal compressor, which is the most important component of an ultra micro gas turbine unit, a 10 times size of the final target compressor (impeller outer diameter 40 mm, corrected rotational speed 220,000 r/min) was designed. The problems to be solved for downsizing were examined and a 2-dimensional impeller was chosen as the first model due to its productivity. The conventional 1D prediction method and CFD were used. The prototype compressor was tested by using cold air at the reduced speed of 110,000 r/min. Following to the 10 times model, a 5 times size of the final target model having fully 3-dimensional shape (impeller outer diameter 20 mm, corrected rotational speed 500,000 r/min) was designed and tested by using hot gas at the reduced speed of 250,000 r/min.

Original languageEnglish
Pages (from-to)308-313
Number of pages6
JournalJournal of Thermal Science
Issue number4
Publication statusPublished - 2005 Dec


  • 3-dimensional impeller
  • Centrifugal compressor
  • Performance characteristics

ASJC Scopus subject areas

  • Condensed Matter Physics


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