An Assessment of the Noise Generated by the Wind Turbine with Winglet
Date Issued
2011
Date
2011
Author(s)
Liou, Jia-Wen
Abstract
This study choose TECO wind turbine blade to investigate the noise of three-dimensional air flowing through the windmill wing generated by its pressure variation, and the impact of increasing the wind turbine blades winglet g tip on the change of vortices and the noise. First, this study generate the analysis mesh with a geometrical pre- processor Gambit, then use the Fluent software to construct the discrete control equation which solution solved by iterative methods. Reynolds averaged Navier-Stokes (RANS) equations are used to describe the turbulent flow field. The computational results by RANS, including torque and pressure distributions. Fluent can calculate its optimum factor under each wind speed corresponding to RPM. After comparing and verifying our results with the manufacturer data, we continued calculating the efficiency of wind turbines, We also analysd the noise of turbulent flow, based on our results.
Installing the winglet can reduce the drag and the wake of large aircraft. Therefore, investigating the changing of winglet its length and tapered ratio installing on TECO wind turbine blades we can know if the effect of noise on the environment is improved or not. And this study analyzed the sound field with Broadband Noise Source Model (BNS), which based on the Lighthill’s acoustic analogy.
Installing the winglet can reduce the drag and the wake of large aircraft. Therefore, investigating the changing of winglet its length and tapered ratio installing on TECO wind turbine blades we can know if the effect of noise on the environment is improved or not. And this study analyzed the sound field with Broadband Noise Source Model (BNS), which based on the Lighthill’s acoustic analogy.
Subjects
small wind turbines
turbulence
aerodynamic sound
BNS
Type
thesis
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