Preconditioning numerical method and performance investigation of plunging dual-foils (2)

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Conference9th National Conference on Theoretical and Practical Oscillations and Vibrations, October 16-22, 2007, Hangzhou, China
AbstractThis paper employs the preconditioning method for unsteady dual-time NS equations to evaluate and analyze the performance of symmetrical plunging dual-foils. The result shows that the trend of efficiency and thrust versus speed agreed well with previous experimental measurement. With a fixed frequency and changing speed, the maximum thrust and efficiency was obtained and with the increase of frequency the maximum thrust and efficiency shifted rightward. These dynamic angles of attack corresponding to the maximum points of thrust and efficiency fall in between 6 to 9 degrees. The vector graph and pressure nephogram showed the transportation and diffusion of vortex separation, revealed that the wing-in-ground effect occurred when dual-foils symmetrically plunging, and this resulted in an increase of averaged thrust and efficiency.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number6486
NPARC number8896171
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Record identifier46a980ac-7360-427c-8cc0-6ebd236e957e
Record created2009-04-22
Record modified2016-05-09
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