A RANS/DES Numerical Procedure for Axisymmetric Flows with and without Strong Rotation

Andrade, Andrew

doi:10.2172/925996

Cited by 2 publications

(2 citation statements)

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“…The Navier-Stokes codes has been verified with analytical data for a series of standard test cases such as steady inviscid flow over circular bumps, turbulent flow over airfoils, and laminar and turbulent flow over a flat plate, as well as axi-symmetric flows [17][18][19]. The focus of the current investigation is to demonstrate and validate the DES model for a separated flow and to determine what advantage may exist, in terms of accuracy, for DES compared to threedimensional URANS and its applicability in the design process.…”

Section: Resultsmentioning

confidence: 99%

“…A multiplegrid convergence acceleration scheme [12] is used for steady, Reynolds-averaged Navier-Stokes solutions and the inner convergence loop of unsteady simulations using the dual time-step scheme. The approach is called MBFLO and has two-dimensional [17], axi-symmetric [18] (with and without swirl), and three-dimensional [19] versions. The three-dimensional procedure and results for a DES using the Bush and Mani algorithm for flow over a wall-mounted hump are described here.…”

Section: Numerical Techniquesmentioning

confidence: 99%

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A DES Procedure Applied to a Wall-Mounted Hump

Bozinoski

Davis

2012

International Journal of Aerospace Engineering

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This paper describes a detached-eddy simulation (DES) for the flow over a wall-mounted hump. The Reynolds number based on the hump chord isRec=9.36×105with an in-let Mach number of 0.1. Solutions of the three-dimensional Reynolds-averaged Navier-Stokes (RANS) procedure are obtained using the Wilcoxk−ωequations. The DES results are obtained using the model presented by Bush and Mani and are compared with RANS solutions and experimental data from NASA's 2004 Computational Fluid Dynamics Validation on Synthetic Jets and Turbulent Separation Control Workshop. The DES procedure exhibited a three-dimensional flow structure in the wake, with a 13.65% shorter mean separation region compared to RANS and a mean reattachment length that is in good agreement with experimental measurements. DES predictions of the pressure coefficient in the separation region also exhibit good agreement with experiment and are more accurate than RANS predictions.

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Section: Resultsmentioning

confidence: 99%