[en] RANS turbulence models still represent a weak point of industrial simulations of turbomachinery flows. In presence of a large blade loading the turbulence model can impact severely on the prediction of the end-wall flow and secondary structures in the blade passage, with an important effect on the computed global performance and flow stability. This paper presents a turbulence model comparison for the characterization of a highly-loaded low-pressure compressor at multiple operating points using 3D RANS simulations. The turbulence models mostly employed for the design and analysis of axial compressors are considered, with the aim of providing a clear physical description of their impact on the critical flow features of the machine. It will be shown that no single turbulence model is generally better than others and the prediction depends on the operating point, with increasing discrepancies as the mass-flow is reduced.
Disciplines :
Mechanical engineering
Author, co-author :
Toracchio, Riccardo ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; von Karman Institute for Fluid Dynamics, Turbomachinery and Propulsion Department, Chaussée de Waterloo 72, Rhode-St-Genèse, Belgium
Fontaneto, Fabrizio; von Karman Institute for Fluid Dynamics, Turbomachinery and Propulsion Department, Chaussée de Waterloo 72, Rhode-St-Genèse, Belgium
Hillewaert, Koen ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Design of Turbomachines
Language :
English
Title :
ON THE IMPACT OF THE TURBULENCE MODEL ON THE SECONDARY FLOW STRUCTURE OF A HIGHLY-LOADED COMPRESSOR STAGE
Publication date :
28 October 2022
Event name :
Volume 10C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions (Proceedings of ASME Turbo Expo 2022)
Event place :
Rotterdam, Netherlands
Event date :
13-06-2022 => 17-06-2022
Audience :
International
Main work title :
Turbomachinery - Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions
The authors would like to acknowledge the F.R.S-FNRS for funding the FRIA scholarship of Mr. Riccardo Toracchio. Safran Aero Boosters is gratefully acknowledged to make the DREAM compressor stage available for the present study.
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