Investigation of the Performance of Turbulence Models With Respect to High Flow Curvature in Centrifugal CompressorsSource: Journal of Fluids Engineering:;2016:;volume( 138 ):;issue: 005::page 51101Author:Ali, Shady
,
Elliott, Kevin J.
,
Savory, Eric
,
Zhang, Chao
,
Martinuzzi, Robert J.
,
Lin, William E.
DOI: 10.1115/1.4031779Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The goal of this research is to evaluate the performance of three turbulence models with respect to flow with high curvature in a centrifugal compressor stage designed for an aeroengine. The effectiveness of the curvature correction terms in the twoequation turbulence models is the main focus of this study, as implemented in the curvaturecorrected shear stress transport (SSTCC) model of Smirnov and Menter. The SSTCC model uses a production multiplier in the k and د‰ equations. SSTCC results were compared against the SST model and previous simulations by Bourgeois et al. (2011, “Assessment of Turbulence Model Predictions for an AeroEngine Centrifugal Compressor,†ASME J. Turbomach., 133(1), pp. 1–15) using the Reynolds stress model (RSM–SSG) for stage performance characteristics, experimental velocity profiles at the impeller–diffuser interface, and velocity contours at the diffuser exit. The production multiplier was investigated in the compressor impeller. The comparisons showed that the SSTCC model better predicted the choke region in the pressure characteristic and efficiency characteristic, whereas the SST model better predicted the stall region. However, both models predicted a similar mean flow velocity field. Analysis of the production multiplier demonstrated that the term provided the expected effects near the walls of the convex and concave surfaces. However, away from the walls where turbulent production term was insignificant, the production multiplier showed abnormal predictions. The rotation effects were found to be weaker than the curvature effects near the impeller trailing edge of the current compressor.
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contributor author | Ali, Shady | |
contributor author | Elliott, Kevin J. | |
contributor author | Savory, Eric | |
contributor author | Zhang, Chao | |
contributor author | Martinuzzi, Robert J. | |
contributor author | Lin, William E. | |
date accessioned | 2017-05-09T01:29:32Z | |
date available | 2017-05-09T01:29:32Z | |
date issued | 2016 | |
identifier issn | 0098-2202 | |
identifier other | fe_138_05_051101.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/161356 | |
description abstract | The goal of this research is to evaluate the performance of three turbulence models with respect to flow with high curvature in a centrifugal compressor stage designed for an aeroengine. The effectiveness of the curvature correction terms in the twoequation turbulence models is the main focus of this study, as implemented in the curvaturecorrected shear stress transport (SSTCC) model of Smirnov and Menter. The SSTCC model uses a production multiplier in the k and د‰ equations. SSTCC results were compared against the SST model and previous simulations by Bourgeois et al. (2011, “Assessment of Turbulence Model Predictions for an AeroEngine Centrifugal Compressor,†ASME J. Turbomach., 133(1), pp. 1–15) using the Reynolds stress model (RSM–SSG) for stage performance characteristics, experimental velocity profiles at the impeller–diffuser interface, and velocity contours at the diffuser exit. The production multiplier was investigated in the compressor impeller. The comparisons showed that the SSTCC model better predicted the choke region in the pressure characteristic and efficiency characteristic, whereas the SST model better predicted the stall region. However, both models predicted a similar mean flow velocity field. Analysis of the production multiplier demonstrated that the term provided the expected effects near the walls of the convex and concave surfaces. However, away from the walls where turbulent production term was insignificant, the production multiplier showed abnormal predictions. The rotation effects were found to be weaker than the curvature effects near the impeller trailing edge of the current compressor. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Investigation of the Performance of Turbulence Models With Respect to High Flow Curvature in Centrifugal Compressors | |
type | Journal Paper | |
journal volume | 138 | |
journal issue | 5 | |
journal title | Journal of Fluids Engineering | |
identifier doi | 10.1115/1.4031779 | |
journal fristpage | 51101 | |
journal lastpage | 51101 | |
identifier eissn | 1528-901X | |
tree | Journal of Fluids Engineering:;2016:;volume( 138 ):;issue: 005 | |
contenttype | Fulltext |