F331 内面ヒダ付き管の気流音II(F-33 騒音(3),一般講演)

概要

論文の詳細を見る
Experimental investigation is carried out aiming at a unified interpretation of sound generation by flows in ducts with, or along, corrugated walls. Such class of flow-configurations may include those in human trachea, heat exchanger with parallel tube-wall. and so-called "magic pipe". Hand made models of once commercial "Magic pipe" successfully generated sound, exept at very low air speed. Using them as well as the magic pipe partly covered with smooth sheets, the sound is found to be the larger for the more surface corrugated. In addition, the frequency of sound seems much too low for flow velocity divided by corrugation pitch. These observations are beyond the scope of present interpretation by the author.
日本流体力学会の論文
2004-08-09