Experimental Research And Experimental Methods

1445 Words Nov 12th, 2015 6 Pages
To be competitive as renewable energy recourse turbines in wave energy generation must be robust and economical for a number of years. Approaches utilize experiments to characterize and predict the effect of parameters involved. One of which is advancements to turbine blades due to unsteady hydrodynamic loads. Characterizing these loads can determine their fatigue life and determine a more reliable material to be used for manufacturing the blades avoiding premature failure. Reliability is necessary due to most renewable wave energy devices are being placed in remote locations where it is not economical to maintain or replace failed hardware. Turbulent flow across the turbine blade creates moments and bending of the blades which is a challenge to designers. To date failure due to these loads have occurred on early generation blades that did not meet the intended use of the design due to unknown effects of turbulence and unsteady loads fatiguing the material. This can be due to lack of experimentation of these unpredictable loads. Current research and experimental methods have been developed to quantify the loading and determine the complexity to predict the life of the turbine blades similar to the one illustrated in Figure 1.

Unsteady hydrodynamic loads consistently impact turbine blades as the water flows across in an axial direction. The boundary layer effect remains attached to the blades along the outer section along with circulatory forces due to…
Open Document