軸流送風機の動翼回転騒音の能動的最小化

概要

論文の詳細を見る
This paper describes a theoretical study of active control of blade rotational noise radiated from an axial flow fan when using a secondary source which consists of several point sources. The primary source analyzed here is a circular multipole source in phase rotation. Additional point sources are arranged on a concentric circle at regular intervals. The optimal strength of the secondary source and minimum sound power output are deduced. The characteristics of total power radiated from both sources are discussed by means of numerical analysis, and attenuation in total power is also investigated. It is found that significant attenuation can be achieved if the phase velocities of the sources are lower than the sound speed. The effect of the radial distribution of the circular source on the attenuation in total power is examined, and is found to be almost negligible.
社団法人日本機械学会の論文
1993-06-25