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Vortex moment map for unsteady incompressible viscous flows
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Li, Juan, Wang, Yinan, Graham, Michael and Zhao, Xiaowei (2020) Vortex moment map for unsteady incompressible viscous flows. Journal of Fluid Mechanics, 891 . A13. doi:10.1017/jfm.2020.145 ISSN 0022-1120.
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WRAP-Vortex-moment-map-unsteady-incompressible-viscous flows-2020.pdf - Accepted Version - Requires a PDF viewer. Download (1835Kb) | Preview |
Official URL: http://dx.doi.org/10.1017/jfm.2020.145
Abstract
In this paper, a vortex moment map (VMM) method is proposed to predict the pitching moment on a body from the vorticity field. VMM is designed to identify the moment contribution of each given vortex in the flow field. Implementing this VMM approach in starting flows of a NACA0012 airfoil, it is found that, due to the rolling up of leading-edge vortices (LEVs) and trailing-edge vortices (TEVs), the unsteady nose-down moment about the quarter chord is higher than the steady-state value. The time variation of the unsteady moment is closely related to the LEVs and TEVs near the body and the VMM gives an intuitive understanding of how each part of the vorticity field contributes to the pitching moment on the body.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Vortex-motion , Unsteady flow (Fluid dynamics) , Viscous flow | ||||||||
Journal or Publication Title: | Journal of Fluid Mechanics | ||||||||
Publisher: | Cambridge University Press | ||||||||
ISSN: | 0022-1120 | ||||||||
Official Date: | 25 May 2020 | ||||||||
Dates: |
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Volume: | 891 | ||||||||
Article Number: | A13 | ||||||||
DOI: | 10.1017/jfm.2020.145 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | This article has been published in a revised form in Journal of Fluid Mechanics http://dx.doi.org/10.1017/jfm.2020.145. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © © The Author(s) | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Copyright Holders: | © The Author(s), 2020. Published by Cambridge University Press | ||||||||
Date of first compliant deposit: | 4 May 2020 | ||||||||
Date of first compliant Open Access: | 23 September 2020 | ||||||||
RIOXX Funder/Project Grant: |
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