Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Flow Vortex Structure Control Past A Body by Changing Its Shape and Angular Position
I. V. Zagumennyi
Abstract:
The paper is devoted to numerical analysis of stratified flow vortex structure around a plate under action of the unperturbed incoming free stream at a moderate Reynolds number for various geometrical modifications of the leading and trailing edges of the plate. The study is based on high-accuracy schemes and fine-resolution 2D numerical simulation of the system of equations for multicomponent inhomogeneous fluid mechanics in the frame of the OpenFOAM tools with open source, which enables computing flows of both stratified and homogeneous viscous fluids in a single formulation. Unsteady patterns of vorticity and pressure fields are analysed at various degrees of corner rounding at the leading edge of the plate and its trailing edge sharpening with a special focus on evaluation of temporal-spatial scales and intensity of the leading-edge vortices and vortex street in the wake flow. Transformation of the flow vortex structure is shown, when step-by-step modifying a rectangular plate with sharp corners into a more streamline-shaped one with rounded leading edge and tapered trailing one, up to the most appropriate NACA wing profile which is examined in details at various angles of attack.
Keywords:
flow structure, plate, wing profile, vortices, vortex street, OpenFOAM

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2019.032

In Proceedings Topical Problems of Fluid Mechanics 2019, Prague, 2019 Edited by David Šimurda and Tomáš Bodnár, pp. 235-240 ISBN 978-80-87012-69-7 (Print) ISSN 2336-5781 (Print)