Fault Diagnosis of Horizontal Axis Turbine with Different Twist Angle to Reduce Stress under Failure Thrust Force

Five types of configurations of tidal turbine blade including validation model have been considered with different profile tidal turbine blade with twist angle of 9, 10, 10.5, 11, 11.5 and 12 degrees. An optimized model of tidal turbine blades is developed. The simulation of the optimized model i.e. 12 degree twist angle gives minimum value of stress and deformation at different loads i.e. 441, 271, 272 and 610N which has optimized and converged result compared to respected models of tidal turbine blade, it has also been observed that stress and deformation was reduced at static load of 610N in 12 degree twist angle tidal turbine blade with the Zylon, Kevlar and CFRP material, thus the observed fault is diagnosed in this present research work. The configuration of optimized model gives maximum convergence on all parameters amongst all the configurations used.

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Rotational sampling of waves by tidal turbine blades

Renewable Energy ◽

10.1016/j.renene.2020.10.037 ◽

2020 ◽

Vol 162 ◽

pp. 2197-2209

Author(s):

S. Draycott ◽

J. Steynor ◽

A. Nambiar ◽

B. Sellar ◽

V. Venugopal

Keyword(s):

Turbine Blades ◽

Tidal Turbine ◽

Tidal Turbine Blades

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Erosion Mapping of Through-Thickness Toughened Powder Epoxy Gradient Glass-Fiber-Reinforced Polymer (GFRP) Plates for Tidal Turbine Blades

Lubricants ◽

10.3390/lubricants9030022 ◽

2021 ◽

Vol 9 (3) ◽

pp. 22

Author(s):

Emadelddin Hassan ◽

Iasonas Zekos ◽

Philip Jansson ◽

Toa Pecur ◽

Christophe Floreani ◽

...

Keyword(s):

Glass Fiber ◽

Polymer Matrix ◽

Turbine Blades ◽

Fiber Reinforced Polymer ◽

Blade Surface ◽

Glass Fiber Reinforced Polymer ◽

Reinforced Polymer ◽

Glass Fiber Reinforced ◽

Tidal Turbine ◽

Tidal Turbine Blades

Erosion of tidal turbine blades in the marine environment is a major material challenge due to the high thrust and torsional loading at the rotating surfaces, which limits the ability to harness energy from tidal sources. Polymer–matrix composites can exhibit leading-blade edge erosion due to marine flows containing salt and solid particles of sand. Anti-erosion coatings can be used for more ductility at the blade surface, but the discontinuity between the coating and the stiffer composite can be a site of failure. Therefore, it is desirable to have a polymer matrix with a gradient of toughness, with a tougher, more ductile polymer matrix at the blade surface, transitioning gradually to the high stiffness matrix needed to provide high composite mechanical properties. In this study, multiple powder epoxy systems were investigated, and two were selected to manufacture unidirectional glass-fiber-reinforced polymer (UD-GFRP) plates with different epoxy ratios at the surface and interior plies, leading to a toughening gradient within the plate. The gradient plates were then mechanically compared to their standard counterparts. Solid particle erosion testing was carried out at various test conditions and parameters on UD-GFRP specimens in a slurry environment. The experiments performed were based on a model of the UK marine environment for a typical tidal energy farm with respect to the concentration of saltwater and the size of solid particle erodent. The morphologies of the surfaces were examined by SEM. Erosion maps were generated based on the result showing significant differences for materials of different stiffness in such conditions.

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