The purpose of this research is to investigate the physical mechanisms associated with broadband tip vortex noise caused by rotating wind turbines. The flow and acoustic field around a wind turbine blade is simulated using compressible large-eddy simulation and direct noise simulation, with emphasis on the blade tip region. The far field aerodynamic noise is modeled using acoustic analogy. Aerodynamic performance and acoustic emissions are predicted for the actual tip shape and an ogee type tip shape. For the ogee type tip shape the sound pressure level decreases by 5 dB for frequencies above 4 kHz.
Wind Turbine Blade Tip Flow and Noise Prediction by Large-eddy Simulation
Contributed by the Solar Energy Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division, March 31, 2004; final revision July 5, 2004. Associate Editor: P. Chaviaropoulos.
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Fleig, O., Iida, M., and Arakawa, C. (November 18, 2004). "Wind Turbine Blade Tip Flow and Noise Prediction by Large-eddy Simulation ." ASME. J. Sol. Energy Eng. November 2004; 126(4): 1017–1024. https://doi.org/10.1115/1.1800551
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