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Numerical analyses of flow around airfoils subjected to flow induced vibration

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Abstract

This paper describes extensive computer-based analytical studies on the details of unsteady flow behavior around airfoils subjected to flow induced vibration in turbo-machinery. To consider the time-dependent motions of airfoils, a complete Navier-Stokes solver incorporating a moving mesh based on an analytic solution of motion equation for airfoil translation and rotation was applied. The drag and lift coefficients for the cases of stationary airfoils and airfoils subjected to flow induced vibration were examined. From the numerical results in non-coupling case as out of consideration of the airfoil motion, it was found that the separation vortex consisted of large-scale rolls with axes in the span direction, and rib substructures with axes in the stream direction. In the coupling simulation including the airfoil motion, both the translation and the rotation displacement were gradually increased when the airfoil translation and rotation natural frequencies synchronize exactly with the oscillation frequency of the fluid force. In addition, the transformation from complex structure with rolls and ribs to two-dimensional aspect of only rolls could be visualized in three-dimensional simulation.

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Authors and Affiliations

  1. Corporate Research & Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, 212-8582, Saiwai-ku, Kawasaki, Japan

    Yokono Y. & Biswas D.

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  1. Yokono Y.
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  2. Biswas D.
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Yasuyuki Yokono: He received his M.Sc .(Eng) and Ph D. in Mechanical Engineering in 1982 and 1985, respectively from Sophia University. He has been working at Toshiba Corporation from 1985. During 1992–1994, he worked at Tokyo Institute Technology as a visiting associate professor. His recent research interests are computational fluid dynamics, computer graphics, thermal designs of electronic equipment and thermal-hydrodynamics in power plant.

Debasish Biswas: He received the M.Tech degree in mechanical engineering from the Indian Institute of Technology, Delhi, India in 1984, and the Dr.Eng. in energy science from the Tokyo Institute of Technology, Tokyo, Japan, in 1987. In 1988, he joined the Toshiba Research and Development Center, Japan, (presently senior research engineer) and has since been working on the design and development of heavy electrical appliances. His field of research is the modeling of unsteady laminar to turbulent transitional flow, reactive flow (combustion, plasma phenomena), unsteady transitional heat transfer problem, flow-induced noise and vibration problem, etc.

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Yokono, Y., Biswas, D. Numerical analyses of flow around airfoils subjected to flow induced vibration. J Vis 10, 271–280 (2007). https://doi.org/10.1007/BF03181694

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  • DOI: https://doi.org/10.1007/BF03181694

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