管内多孔板からの渦放出に伴う圧力脈動
ロックイン現象に関与する因子
1997 年 63 巻 610 号 p. 1869-1874
詳細
1997 年 63 巻 610 号 p. 1869-1874
The pressure fluctuation caused by the ring vortex shedding from a perforated plate with some holes installed in a pipe was investigated experimentally. Measurements were made using pressure transducers at Reynolds numbers from 6.74 x 103 to 4.02 x 104 based on the velocity through the hole. A lock-in phenomenon is affected significantly by the flexural rigidity of the perforated plate. When this phenomenon occurs, the amplitude of the pressure fluctuation increases markedly. While the velocity range generating the lock-in phenomenon shifts to a higher velocity as the plate thickness increases, the frequency of the pressure pulsation is independent of it. It was also found that the pipe length both upstream and downstream of the plate exerts a great influence.
