Fluid Structure Interaction Analysis of a Micro-Hydrokinetic Turbine Rotor Blade
Madu, Orji and Uyaelumuo (2018). Research Journal of Mechanical Operations, 1 (1): 10-23
13 Pages Posted: 17 Nov 2018
Date Written: October 25, 2018
The objective of this study is to investigate numerically the structural integrity of a new micro hydrokinetic turbine adopting a jet engine blade shape configuration. Simulations are carried out using a commercial CFD solver. One-way fluid structure interaction technique is implemented to solve the quasi-static field problem. The numerical predictions of the flow around two model scale turbine blades in uniform inflow are presented and discussed. The result of the pressure coefficient predicted by the CFD analysis is satisfactory in comparison with the articles in the literature. The study however, examined two model scale blades with different material properties (structural steel and e-glass epoxy blade). Recommendations are made based on the results of structural response predicted by the analysis. The mechanical properties of the model scale turbine blades relevant to the analysis are considered and discussed. The predicted maximum displacement for two model scale tidal blades are little and could be reasonable considered negligible. However, the steel blade material performed better due to its high stiffness property. The results also show that the predicted maximum von-Mises stress for the two scale models is less than their tensile yield strength property. Consequently, due to high density and unsteady turbulence present in the fluid medium, a structural steel blade material is recommended for the blade construction for its high structural integrity.
Keywords: Horizontal Axis Micro-Hydrokinetic Tidal Turbine; One-Way Fluid Structure Interaction (FSI); Renewable Energy; Tidal Stream Energy
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