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Use of Modified Balje Maps in the Design of Low Reynolds Number Turbocompressors

[+] Author Affiliations
Roberto Capata, Enrico Sciubba

University of Roma, Roma, Italy

Paper No. IMECE2012-85582, pp. 835-841; 7 pages
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4523-3
  • Copyright © 2012 by ASME


The design of micro and ultra-micro turbomachinery introduces severe challenges due to the absence of a reliable and sufficiently extended database, so that the phenomenological differences among micro-turbomachines and between micro- and commercial-scale devices must be semi-empirically modelled from case to case. Scope of this study is to verify the possibility of extending the usual design correlations and maps to such small scales: specifically, this paper presents a procedure to conveniently modify the standard performance Balje map so that it can be adopted “as is” in the design of a micro and ultra-micro machines. The results of a systematic comparison with the general Stodola-like formula allow extending the applicability of Re-corrected Balje and Smith charts to the range of Re ≤ 105.

Copyright © 2012 by ASME



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