LES直接騒音計算による風車翼のシミュレーション(S21-3 自然の流体エネルギー利用技術(3),S21 自然の流体エネルギー利用技術)

概要

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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 3 kHz. No difference is observed in the overall aerodynamic performance of the wind turbine blade.
一般社団法人日本機械学会の論文
2004-09-04