連続溝付き管内の空気流れで生じる音の特性 : 第1報,溝ピッチ一定の場合(流体工学,流体機械)

概要

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An experimental investigation has been carried out for the flow-induced sound in a grooved circular pipe. The length of the pipe is 500mm, the inner diameter is 23mm and the groove pitch is kept at 8mm. The velocity in the pipe is varied from 6m/s to 66m/s. In the region of the velocity smaller than 30m/s, the frequency of the sound generated in the pipe increases in the shape of stairs with increase of the velocity, and then resonant sound of the pipe generates from the pipe. When the velocity becomes large, the frequency of the sound increases linearly to the velocity. The shape of change of the frequency can be explained from characteristics of a cavity flow and lock-in phenomenon by the resonant frequency of the pipe.
一般社団法人日本機械学会の論文
2006-08-25