Non-ideal Effects in Compressible Swirling Flows

Francesco Tosto, Andrea Giuffre’, Piero Colonna, Matteo Pini*

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientificpeer-review

2 Citations (Scopus)
38 Downloads (Pure)


In this work we examine the behavior of non-ideal compressible swirling flows. Based on a first-principle analysis, we derive a generalized expression of the corrected flow per unit area as function of the isentropic exponent, characteristic Mach numbers, and swirl parameter. The calculated trends of the corrected flow with respect to these parameters, validated against results from high-fidelity computations, are used to infer physical insights on the behavior of swirling flows in turbomachinery cascades. The results suggest that fluid flows characterized by low values of the isentropic exponent show swirling behaviors that are substantially different than those exhibited by perfect gases. Ultimately, this can make the design of efficient turbomachines operating close to the critical point particularly challenging.

Original languageEnglish
Title of host publicationERCOFTAC Series
Number of pages8
Publication statusPublished - 2021

Publication series

ISSN (Print)1382-4309
ISSN (Electronic)2215-1826

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Corrected flow function
  • Isentropic exponent
  • Swirling flow


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