Numerical Predictions and Experimental Verifications for the Hydrodynamic Performance of Horizontal Axis Marine Current Turbine

2013 ◽  
Vol 694-697 ◽  
pp. 635-638
Author(s):  
Rui Jun Fan ◽  
Hong Chao Gao ◽  
J. R. Chaplin

This paper presents the numerical predictions of 3D CFD rotor computations of an 800mm diameter model of marine current turbine (MCT). In the paper CFD is applied to a rotor at stationary hydrodynamic conditions Simulations from the numerical prediction are compared with experimental measurements of the model of MCT which is experimented on in a cavitation tunnel and a towing tank. The experimental data includes measurements of power and thrust generated by the turbine, in both a cavitation tunnel and a towing tank, for a series of blade pitch settings and speeds. The numerical predictions show similar results and provide a satisfactory representation of the experimental turbine performance.

2009 ◽  
Vol 419-420 ◽  
pp. 309-312 ◽  
Author(s):  
Rui Jun Fan ◽  
J.R. Chaplin ◽  
Guang Jun Yang

This paper presents the 3D CFD computation of an 800mm diameter model of MCT based on structured grids, RANS equations and turbulence model. A time-accurate, upwind, finite volume method for computing compressible flows on structured grids is presented. Numerical predictions for a series of blade pitch angle settings and speeds are compared with the other simulation results of commercial software, verified by the experimental measurement of the model. Such results provide confidence in using the CFD computation tools to develop the forthcoming design of MCT.


2018 ◽  
Vol 7 (4.10) ◽  
pp. 455 ◽  
Author(s):  
EJ Avital ◽  
K Ai ◽  
N Venkatesan ◽  
A Samad ◽  
T Korakianitis

The hydrodynamic performance of a dual-rotor horizontal axis marine turbine (HAMCT) is investigated for the power gain in operating the rear rotor without blade-pitch control. This kind of turbine can be advantageous for a rectilinear tidal current of reversing directions, where each rotor blade is optimally fixed-pitched towards its upstream velocity. The blade element momentum (BEM) method is coupled with the Park wake model. A generic three-blade turbine is shown to gain up to 20% in the coefficient of power CP as relative to the front rotor CP when operating the rear rotor at the same tip speed ratio (TSR) as the front one, gaining overall CP up to 0.55. Analytic model is derived to backup the estimate of power gain. Plots for turbine performance variation with TSR and profile hydrodynamic efficiency are given, and analysed for lab and small-medium size turbines.  


2014 ◽  
Vol 66 ◽  
pp. 257-267 ◽  
Author(s):  
Jessica M. Walker ◽  
Karen A. Flack ◽  
Ethan E. Lust ◽  
Michael P. Schultz ◽  
Luksa Luznik

2013 ◽  
Vol 3-4 ◽  
pp. 27-40 ◽  
Author(s):  
Ethan E. Lust ◽  
Luksa Luznik ◽  
Karen A. Flack ◽  
Jessica M. Walker ◽  
Max C. Van Benthem

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