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Analysis of the choking condition of one-dimensional diabatic flows with wall friction

Published online by Cambridge University Press:  12 October 2023

Alessandro Ferrari Open the ORCID record for Alessandro Ferrari [Opens in a new window]  and
Oscar Vento Open the ORCID record for Oscar Vento [Opens in a new window]
Alessandro Ferrari*
Affiliation:
Energy Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy
Oscar Vento
Affiliation:
Energy Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy
*
†Email address for correspondence: [email protected]
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Abstract

The choking condition of a one-dimensional steady-state diabatic flow, with wall friction, of a perfect gas through a constant cross-section pipe has been analysed by applying a recent analytical solution. Such a choking condition can be achieved for an initially subsonic flow and a supersonic one, even when the heat flux goes from the fluid to the wall. Entropy–enthalpy diagrams have been analysed, and a universal choking condition for compressible diabatic flows with wall friction has been determined. The analytical solution of a supersonic flow, in which a normal shock occurs, has been obtained for a diabatic flow with wall friction and compared with the results of a numerical model.

JFM classification

Compressible Flows: Gas dynamics Compressible Flows: Supersonic flow
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 973 , 25 October 2023 , A10
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Copyright
© The Author(s), 2023. Published by Cambridge University Press

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