1352 マイクロ風車の騒音解析と発生機構

概要

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The wind turbine noise is one of environmental factors to be considered before installation. There are two potential sources of the noise, i.e., mechanical noise originates from gear and gearbox and aerodynamic noise radiated from blades. This report deals with the aerodynamic noise from the blades of a micro wind turbine. The wind turbine, having three blades and rotating in the horizontal axis, was tested in a laboratory room. The sound pressure level (SPL) and power spectrum were measured in a range of rotation speed from 300 to 2400rpm. The SPL over 110dB was recorded at the speed of 2400rpm. The two dimensional CFD analysis was performed for the blade tip to simulate the surface pressure distribution change and vibration of the blade. It is clarified that the noise from the blade is affected by the attack angle and stall and the instabilities of the boundary layer separation flow.
社団法人日本機械学会の論文
2003-08-05