C231 エッジトーンにおける振動モード遷移のシミュレーション

概要

論文の詳細を見る
The transition of oscillation mode in the edge tone is investigated by high performance computing. In the past, a considerable number of scientific researches were made on the air-reed instruments. However, these studies were conducted from an acoustic point of view with assumption that source of sound constitutes of single frequency. It is only experimental study that treats the sounding mechanism of air-reed instruments. G. B. Brown made experiments on the edge tone and obtained an experimental equation in 1937,which gives a relation between the velocity of the air and the frequency of edge tone. According to the Brown's experiment, the frequency of edge tone is basically in proportion to the velocity of jet, while the oscillation mode changes at several points. In this study, edge tone is simulated by computational fluid dynamics. The simulation can successfully capture the oscillation of air jet including the transition of oscillation mode. Accuracy of the computer simulation is confirmed by comparing it to the Brown's experimental equation.
日本流体力学会の論文
2002-07-23