Compatibility of Characteristic Boundary Conditions with Radial Equilibrium in Turbomachinery Simulations

Abstract : Setting up outlet boundary conditions in configurations that have a strong rotating motion is a crucial issue for turbomachinery simulations. This is usually done using the so-called radial equilibrium assumption, which is used before the simulation and provides an approximate expression for the pressure profile to impose in the outlet plane. This paper shows that recent methods developed for compressible flows, based on characteristic methods, including the effects of transverse terms, can capture the radial equilibrium naturally without having to impose a precomputed pressure profile. In addition, these methods are also designed to control acoustic reflections on boundaries, and the present work suggests that they could replace classical radial equilibrium assumption approximations when nonreflecting boundary conditions are required at the outlet of a turbomachine simulation, for example, in large eddy simulation. This is demonstrated in two cases: 1) a simple annulus flow with a swirl imposed at the inlet and 2) a transonic turbine vane.
Liste complète des métadonnées

Cited literature [1 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01136917
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, March 30, 2015 - 9:43:17 AM
Last modification on : Friday, April 12, 2019 - 4:22:39 PM
Document(s) archivé(s) le : Tuesday, April 18, 2017 - 3:06:30 AM

File

koupper_13525.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Charlie Koupper, Thierry Poinsot, Laurent Y.M. Gicquel, Florent Duchaine. Compatibility of Characteristic Boundary Conditions with Radial Equilibrium in Turbomachinery Simulations. AIAA Journal, American Institute of Aeronautics and Astronautics, 2014, vol. 52 (n° 12), pp. 2829-2839. ⟨10.2514/1.J052915⟩. ⟨hal-01136917⟩

Share

Metrics

Record views

107

Files downloads

287