Abstract
The blade is the key component for energy capture in horizontal axis tidal current turbine, and the blade’s design is directly related to the efficiency of the power generation device. The seawater flow velocity is a crucial parameter for blade design. Since the seawater velocity changes constantly, it is extremely important to determine the design velocity of the blade. This article proposes a calculation method for the design velocity of the blade so that the designed blade can achieve better energy collection efficiency under a variable flow velocity. This study performed the following investigations: (1) The author tested and analyzed the seawater velocity variation at the experimental site, determining the designed flow velocity via calculations; (2) The author combined the blade element momentum and Wilson’s optimization design method using the MATLAB software to calculate the blade shape parameters and predict the performance under a number of different flow velocity forecasts; (3) When testing the device under sea conditions, the experimental results showed that the performance capture devices and digital projections are basically the same, which verifies the validity and effectiveness of the design method.
Highlights
There are numerous islands in China; tidal current energy resources are relatively abundant
Tidal current turbines are usually generated from the cut-in flow velocity to overcome the
Since the cut-in velocity of the blade is difficult to predict at the beginning of the design, it will be affected by the entire tidal current power generation device
Summary
There are numerous islands in China; tidal current energy resources are relatively abundant. Most of the current energy capture devices have a high design flow velocity, and the rated power can only be output above 2 m/s [2]. When working in a low flow rate environment, the blade tip–speed ratio is no longer the best, as the energy capture efficiency of the blade will be significantly reduced. When working in8,a989 low flow rate environment, the blade tip–speed ratio is no longer the best, as the. The author used the MATLAB software to analyze and calculate the under low parameters flow velocity. The MATLAB software tounder analyze and calculate the geometric geometric ofThe the author blades used and predict the performance different flow velocities. Parameters of the blades and predict the performance under different flow velocities
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