A Note on the Decomposition of Aerodynamic Forces Induced by A Wind Turbine Flaps
| Autor: | Y. Y. Niu, S. C. Kong, P. J. Shih |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Lift-to-drag ratio Airfoil Angular acceleration Turbine blade 020209 energy Applied Mathematics Mechanical Engineering 02 engineering and technology Mechanics Condensed Matter Physics 01 natural sciences Turbine 010305 fluids & plasmas law.invention Physics::Fluid Dynamics Aerodynamic force Acceleration law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Gurney flap |
| Zdroj: | Journal of Mechanics. 36:585-593 |
| ISSN: | 1811-8216 1727-7191 |
| DOI: | 10.1017/jmech.2020.27 |
| Popis: | In this study, the aerodynamic characteristics of a vertical-axis wind turbine blade coupled with a high-lift device, such as the Gurney flap at the trailing edge, are investigated. For numerical analysis, the force element theory is used to understand how the Gurney flap influences the force evolution of the lift-type vertical-axis wind turbine. This study shows that the lift and drag can be respectively approximated into four elements, which are induced by volume vorticity, rotational velocity, angular acceleration and surface friction of the flow around the blades. Based on the perspective of the force element theory, the present simulation provides a clear picture of how the Gurney flap influences the formation of the aerodynamic force elements during a rotational cycle for a vertical-axis wind turbine. Simulation results show that the contributions mainly result from the surface vorticities, the rotational acceleration of the airfoil, and the acceleration of the surface. |
| Databáze: | OpenAIRE |
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