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Modelling and Simulation in Engineering - Volume 2015 2015, Article ID 565417, 13 pages -

Research Article

Research Institute of Marine Systems Engineering, Seoul National University, Seoul 08826, Republic of Korea

Department of Naval Architecture and Ocean Engineering, Seoul National University, Seoul 08826, Republic of Korea

Received 16 May 2015; Revised 10 August 2015; Accepted 17 August 2015

Academic Editor: Jean-Michel Bergheau

Copyright © 2015 Seung-Jae Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To better understand the vortex shedding mechanism and to assess the capability of our numerical methodology, we conducted numerical investigations of vortex shedding from truncated and oblique trailing edges of a modified NACA 0009 hydrofoil. The hybrid particle-mesh method and the vorticity-based subgrid scale model were employed to simulate these turbulent wake flows. The hybrid particle-mesh method combines the vortex-in-cell and the penalization methods. We have implemented numerical schemes to more efficiently use available computational resources. In thisstudy, we numerically investigated vortex shedding from various beveled trailing edges at a Reynolds number of 10

. We then compared the numerical results with the experimental data, which show good agreement. We also conducted numerical simulations of wakes behind the hydrofoil at rest in periodically varying flows. Results reveal that vortex shedding is affected by the periodicity of a free-stream flow, as well as the trailing-edge shape.





Autor: Seung-Jae Lee, Jun-Hyeok Lee, and Jung-Chun Suh

Fuente: https://www.hindawi.com/



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