NDLI: On the Vortex Breakdown Phenomenon in High Angle of Attack Flows Over Delta Wing Geometries

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Eric, D. Robertson Chitta, Varun Walters, D. Keith Bhushan, Shanti
Copyright Year	2014
Abstract	Using computational methods, an investigation was performed on the physical mechanisms leading to vortex breakdown in high angle of attack flows over delta wing geometries. For this purpose, the Second International Vortex Flow Experiment (VFE-2) 65° sweep delta wing model was studied at a root chord Reynolds number (Recr) of 6 × 106 at various angles of attack. The open-source computational fluid dynamics (CFD) solver OpenFOAM was used in parallel with the commercial CFD solver ANSYS® FLUENT. For breadth, a variety of classic closure models were applied, including unsteady Reynolds-averaged Navier-Stokes (URANS) and detached eddy simulation (DES). Results for all cases are analyzed and flow features are identified and discussed. The results show the inception of a pair of leading edge vortices originating at the apex for all models used, and a region of steady vortical structures downstream in the URANS results. However, DES results show regions of massively separated helical flow which manifests after vortex breakdown. Analysis of turbulence quantities in the breakdown region gives further insight into the mechanisms leading to such phenomena.
File Format	PDF
ISBN	9780791846421
DOI	10.1115/IMECE2014-39354
Volume Number	Volume 1: Advances in Aerospace Technology
Conference Proceedings	ASME 2014 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2014-11-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Computational methods Turbulence Wings Computational fluid dynamics Simulation Vortices Reynolds number Chords (trusses) Eddies (fluid dynamics) Vortex flow Flow (dynamics)
Content Type	Text
Resource Type	Article

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