抄録
The edge tone, which is the sounding source of air-reed instruments is simulated based on computational fluid dynamics using the free mesh method. The air-reed instrument is a kind of woodwind instruments, which does not have any mechanically oscillating parts. In the past, considerable amount of scientific researches have been made on the woodwind instruments from an acoustic point of view. However, all those studies are founded on acoustic assumptions such as existence of the source of sound. In this study, we attempt to elucidate the source of sound, which is considered to be an essential factor in the timbre of musical instruments. Since large computational grids are required for capturing minute change of pressure, a massively parallel supercomputer HITACHI SR8000 is employed for the simulation. The computational results are compared to the Brown's experimental equation, and basic accuracy of the computation is confirmed.
