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Closed-form solution for the edge vortex of a revolving plate

Published online by Cambridge University Press:  18 May 2017

Di Chen Open the ORCID record for Di Chen [Opens in a new window] ,
Dmitry Kolomenskiy Open the ORCID record for Dmitry Kolomenskiy [Opens in a new window]  and
Hao Liu Open the ORCID record for Hao Liu [Opens in a new window]
Di Chen
Affiliation:
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan Shanghai Jiao Tong University and Chiba University International Cooperative Research Center (SJTU-CU ICRC), Shanghai, People’s Republic of China
Dmitry Kolomenskiy*
Affiliation:
Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan Center for Earth Information Science and Technology (CEIST), Japan Agency for Marine–Earth Science and Technology (JAMSTEC), Yokohama 236-0001, Japan
Hao Liu*
Affiliation:
Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan Shanghai Jiao Tong University and Chiba University International Cooperative Research Center (SJTU-CU ICRC), Shanghai, People’s Republic of China
*
†Email addresses for correspondence: dkolom@gmail.com, hliu@faculty.chiba-u.jp
†Email addresses for correspondence: dkolom@gmail.com, hliu@faculty.chiba-u.jp
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Abstract

Flapping and revolving wings can produce attached leading-edge vortices when the angle of attack is large. In this work, a low-order model is proposed for the edge vortices that develop on a revolving plate at $90^{\circ }$ angle of attack, which is the simplest limiting case, yet shows remarkable similarity with the generally known leading-edge vortices. The problem is solved analytically, providing short closed-form expressions for the circulation and the position of the vortex. The good agreement with the numerical solution of the Navier–Stokes equations suggests that, for the conditions examined, the vorticity production at the sharp edge and its subsequent three-dimensional transport are the main effects that shape the edge vortex.

JFM classification

Wakes/Jets: Separated flows Biological Fluid Dynamics: Swimming/flying Vortex Flows: Vortex dynamics

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Type
Papers
Information
Journal of Fluid Mechanics , Volume 821 , 25 June 2017 , pp. 200 - 218
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Copyright
© 2017 Cambridge University Press 

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