Non-ideal Effects in Compressible Swirling Flows

Francesco Tosto; Andrea Giuffre’; Piero Colonna; Matteo Pini

doi:10.1007/978-3-030-69306-0_5

Non-ideal Effects in Compressible Swirling Flows

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

^*Corresponding author for this work

Flight Performance and Propulsion

Research output: Chapter in Book/Conference proceedings/Edited volume › Chapter › Scientific › peer-review

1 Citation (Scopus)

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Abstract

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 language	English
Title of host publication	ERCOFTAC Series
Publisher	Springer
Pages	36-43
Number of pages	8
DOIs	https://doi.org/10.1007/978-3-030-69306-0_5
Publication status	Published - 2021

Publication series

Name	ERCOFTAC Series
Volume	28
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 https://www.openaccess.nl/en/you-share-we-take-care
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.

Keywords

Corrected flow function
Isentropic exponent
Swirling flow

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10.1007/978-3-030-69306-0_5

Tosto2021_Chapter_Non_idealEffectsInCompressibleFinal published version, 1.71 MB

Cite this

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AU - Giuffre’, Andrea

AU - Colonna, Piero

AU - Pini, Matteo

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care 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.

PY - 2021

Y1 - 2021

N2 - 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.

AB - 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.

KW - Corrected flow function

KW - Isentropic exponent

KW - Swirling flow

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Non-ideal Effects in Compressible Swirling Flows

Abstract

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Keywords

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