Acoustic wave emitted by a vortex ring passing near the edge of a half-plane
1985; Cambridge University Press; Volume: 155; Linguagem: Inglês
10.1017/s0022112085001720
ISSN1469-7645
AutoresT. Kambe, T. Minota, Yoichiro Ikushima,
Tópico(s)Fluid Dynamics and Vibration Analysis
ResumoAcoustic emission by vortex–edge interaction is investigated both theoretically and experimentally. The theory of vortex sound enables us to represent the far-field pressure in terms of the vortex motion near the half-plane edge. It is found that the pressure p depends on the product of an angular factor representing directionality and a time factor representing wave profile. The pressure formula leads to the scaling law time derivative of the volume flux (through the vortex ring) of a hypothetical potential flow around the edge.
Referência(s)