Tan, K. J. B., Hesse, H. and Wang, P. C. (2020) Numerical Capture and Validation of a Massively Separated Bluff-Body Wake. In: AIAA Aviation 2020 Forum, 15-19 Jun 2020, ISBN 9781624105982 (doi: 10.2514/6.2020-2713)
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Abstract
A flow over a bluff-body is numerically investigated and validated using a Detached-Eddy Simulation (DES) technique at Re=21,400. An incompressible solver that is nominally second-order accurate employing an implicit constant backward time-stepping scheme with blended upwind-central differencing spatial discretization is used to study the massively separated wake that is generated. Measurements are taken up to 6 downstream characteristic lengths, evaluating the wake time-averaged first- and second-moment statistics alongside near-wall boundary layer quantities and surface-force integrals. Results advocate the use of DES methods, which are found to be significantly more accurate for capturing wake statistics, compared to two different Reynolds-Averaged (RANS) models calibrated with an identical grid. Although comparative accuracy can be obtained with the RANS techniques for the boundary layer and surface-forces, these techniques are unsuitable for modeling wake statistics as they are inherently dissipative, evident through early velocity recovery when evaluated against experimental data.
Item Type: | Conference Proceedings |
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Additional Information: | The work is funded through the Industrial Postgraduate Programme scholarship by the Economic Development Board of Singapore, in partnership between AviationLearn Pte. Ltd. and the University of Glasgow Singapore. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Hesse, Dr Henrik and Wang, Mr Peng Cheng and Tan, Benjamin |
Authors: | Tan, K. J. B., Hesse, H., and Wang, P. C. |
College/School: | College of Science and Engineering > School of Engineering |
ISBN: | 9781624105982 |
Published Online: | 08 June 2020 |
Copyright Holders: | Copyright © 2020 American Institute of Aeronautics |
First Published: | First published in Proceedings of AIAA Aviation 2020 Forum |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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