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A Comparison of the Predictive Capabilities of Several Turbulence Models using Upwind and Central-Difference Computer CodesFour turbulence models are described and evaluated for transonic flows using the upwind code CFL3D and the central-difference code TLNS3D. In particular, the effects of recent modifications to the half-equation model of Johnson-King are explored in detail, and different versions of the model are compared. This model can obtain good results for both two-dimensional (2D) and three-dimensional (3D) separated flows. The one-equation models of Baldwin-Barth and Spalart-Allmaras perform well for separated airfoil flows, but can predict the shock too far forward at the outboard stations of a separated wing. The equilibrium model of Baldwin-Lomax predicts the shock location too far aft for both 2D and 3D separated flows, as expected. In general, all models perform well for attached or mildly separated flows.
Document ID
20040129592
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Rumsey, Christopher L.
(NASA Langley Research Center Hampton, VA, United States)
Vatsa, Veer N.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1993
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
AIAA Paper 93-0192
Distribution Limits
Public
Copyright
Public Use Permitted.
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