A Better Approach for Modified Bach-Type Savonius Turbine Optimization
The optimization for Savonius design should be addressed for actual application for sustainable research and it should be easily adapted in a different laboratory or wind industry. Most of the optimization is done by modifying the shape of the blade. The Bach-type blades have a simple model with excellent performance. The challenge for designing Bach–type blade is the specific size of the radius circular arc of the blade. This is the reason why most of the optimization is done through simulation. In this article, the authors propose a new approach for designing the radius circular for Bach–type blade by using the Myring equation where the parameter control for the radius can be easily adjusted by θ. The three different values of θ combined with three different blades number are tested experimentally in order to obtain the best turbine model. Data from experiment is analyzed to obtain the CP for each model showing that the highest CP is achieved by three-bladed rotor with θ=10°. Furthermore, the minimum and the maximum value of θ as parameter control are discussed and they can be used as a good reference for further development of Bach-type blades for the Savonius turbine.
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