MyJournals Home  

RSS FeedsEnergies, Vol. 11, Pages 3349: Research on the Hydrodynamic Performance of a Vertical Axis Current Turbine with Forced Oscillation (Energies)

 
 

3 december 2018 13:00:52

 
Energies, Vol. 11, Pages 3349: Research on the Hydrodynamic Performance of a Vertical Axis Current Turbine with Forced Oscillation (Energies)
 




For a current turbine fixed on a floating platform, the wave-induced motion responses of the platform change the hydrodynamic performance of the current turbine. In this paper, a numerical simulation method based on commercial computational fluid dynamics software-CFX is established to systematically analyze the turbine loads condition and power output efficiency of the turbine subject to the wave-induced motion. This method works well in terms of 2D hydrodynamic performance analysis and is verified by an experiment. In addition, the method is applied to investigate the hydrodynamic performance of a vertical axis current turbine under forced oscillation by a combining sliding mesh with moving mesh technique. This research mainly focusses on the effects of oscillation frequency and oscillation amplitude on the hydrodynamic performance and the flow field. It is found that a wake flow similar to the Von Karman Vortex Street appears under sway oscillation. Spacing between vortex in the wake flow changes under surge oscillation. The fluctuations of the blade load coefficients can be decomposed into a low frequency part and a high frequency part. The low frequency part is related to the frequency of the forced oscillation, while the high frequency part is a consequence of the rotational frequency of the turbine. The oscillation amplitudes of the turbine load coefficients increase linearly with the growth of oscillation frequency and oscillation amplitude. This paper can provide a useful reference for similar research on the turbine loads condition and power out efficiency of the turbine subject to wave-induced motion. This paper can also provide a reference on the structural design or electronic control of vertical axis current turbines.


Del.icio.us Digg Facebook Google StumbleUpon Twitter
 
43 viewsCategory: Biophysics, Biotechnology, Physics
 
Energies, Vol. 11, Pages 3350: Feasible Concept of an Air-Driven Fan with a Tip Turbine for a High-Bypass Propulsion System (Energies)
Energies, Vol. 11, Pages 3348: Three-Dimensional Inverse Design of Low Specific Speed Turbine for Energy Recovery in Cooling Tower System (Energies)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Physics

Use these buttons to bookmark us:
Del.icio.us Digg Facebook Google StumbleUpon Twitter


Valid HTML 4.01 Transitional
Copyright © 2008 - 2019 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Travel Photos Nachrichten Indigonet Finances Leer Mandarijn