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Design and aerodynamic performance analysis of a finite span double-split S809 configuration for passive flow control in wind turbines and comparison with single-split geometries
Abstract With the previous knowledge of the effectiveness of single-split blades, questions arise about the effectiveness of a double-split configuration on horizontal axis wind turbine. To shed light on this question, a 3-D double-split finite-span configuration with S809 airfoil profile is designed based on the results of unsteady DES simulations of two families of single-split configurations. Firstly, the two 3-D single-split families with four different values of split width are simulated at angles of attack (AOA) up to 25°. Secondly, a finite span double-split model is designed based on the single-split geometries with the highest aerodynamic performances. It has been found that the double-split configuration had the poorest performance for 0°
Highlights Despite the positive effects of single-split airfoils and blades, double split configurations are still completely vague. At low and moderate AOAs, the double-split model is mainly influenced by its wider split. At high AOAs, the double-split model is superior to the basic single-split configurations. Formation of a separation bubble inside the split severely reduces the aerodynamic performance. A control mechanism can make a double-split configuration considerably more effective.
Design and aerodynamic performance analysis of a finite span double-split S809 configuration for passive flow control in wind turbines and comparison with single-split geometries
Abstract With the previous knowledge of the effectiveness of single-split blades, questions arise about the effectiveness of a double-split configuration on horizontal axis wind turbine. To shed light on this question, a 3-D double-split finite-span configuration with S809 airfoil profile is designed based on the results of unsteady DES simulations of two families of single-split configurations. Firstly, the two 3-D single-split families with four different values of split width are simulated at angles of attack (AOA) up to 25°. Secondly, a finite span double-split model is designed based on the single-split geometries with the highest aerodynamic performances. It has been found that the double-split configuration had the poorest performance for 0°
Highlights Despite the positive effects of single-split airfoils and blades, double split configurations are still completely vague. At low and moderate AOAs, the double-split model is mainly influenced by its wider split. At high AOAs, the double-split model is superior to the basic single-split configurations. Formation of a separation bubble inside the split severely reduces the aerodynamic performance. A control mechanism can make a double-split configuration considerably more effective.
Design and aerodynamic performance analysis of a finite span double-split S809 configuration for passive flow control in wind turbines and comparison with single-split geometries
Moshfeghi, Mohammad (author) / Ramezani, Morteza (author) / Hur, Nahmkeon (author)
2021-05-06
Article (Journal)
Electronic Resource
English
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