The hydrokinetic turbine, using an oscillating foil to extract tidal energy, offers an obvious advantage in shallow water. The software Fluent is used to solve the 2D unsteady incompressible Navier-Stokes equations around an oscillating foil with computations performed with using NACA0015 foil. The parameter μx which indicates the oscillation frequency ratio between the freestream and foil motion, is introduced to identify the effects of time-varying freestream velocity. The mean power coefficients are examined over one period and eight periods, the force evolution is reviewed, and the flow fields around foil are analyzed. The results indicate that time-varying freestream velocity leads to fluctuation of the cycle-averaged power coefficient CP¯, with the maximum fluctuation of CP¯ exceeding 16%. A similar variation trend is observed for CP¯ versus μx under different motion parameters. Furthermore, it is found that CPmean, the mean power coefficient over eight periods, fluctuates slightly with μx, and the maximum fluctuation of CPmean is less than 4%. Therefore, the time-varying freestream velocity slightly affects the total energy harvesting efficiency for a lengthy period.
Ocean Engineering – Elsevier
Published: Apr 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera