流れにより誘起される管列の音響共鳴

概要

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A staggered array of closely packed rigid tubes has been tested, by varying the flow velocity in a wind tunnel, to study the conditions under which acoustical resonances occur. The items which have been studied are : the Strouhal numbers at which flow periodicities occur ; the relation between these Strouhal numbers and those at which acoustical resonances occur ; the effects of the Reynolds number and the longitudinal tube spacing on the occurrence of acoustical resonances. This investigation has shown that the acoustical resonance can be excited at a frequency well apart from that of vortex shedding. The results also show an evidence that both phenomena exis simultaneously at different frequencies. On the basis of these findings and those from a similar investigation into vortex induced tube vibration it is proposed that tube vibration and acoustical vibration can be treated as different mechanisms. Hence the guidelines presented in this paper should be followed to avoid the occurrence of acoustical vibration.
一般社団法人日本機械学会の論文
2000-08-25