Flow-induced acoustic resonance at the mouth of one or two side branches
In the case of flow-induced acoustic resonance with multiple side branches, the pulsation amplitude may be significantly enhanced compared to the case of a single branch. However, few studies have been presented on the effects of the distance between tandem branches or side branches on fluctuating pressure amplitude. In this study, we carried out several air flow experiments at ordinary temperatures and pressures to investigate the effect of the geometrical and flow parameters on the general acoustic resonance. In the case of a single branch, the dimensionless acoustic pressure amplitude at resonance increases as the cross-sectional ratio of the main and branch pipes is decreased. This is attributed to the acoustic radiation loss from the branch pipe to the main pipe increasing at higher values of the cross-sectional ratio. In the case of coaxial branches, the pressure amplitude shows a counter tendency to that in the case of a single branch. This is because the two branches strongly couple and form a standing wave with negligible radiation losses. In the case of tandem branches, peak pressure and frequency change cyclically as the distance between tandem branches changes.
Power uprate Acoustic resonance cavity tone acoustic pressure similarity rule
Keita Okuyama Akinori Tamura Shiro Takahashi Masaya Ohtsuka Masaaki Tsubaki
Hitachi, Ltd., Energy and Environmental Systems Laboratory, 7-2-1 Omika-cho, Hitachi-shi, Ibaraki-ke Hitachi-GE Nuclear Energy, Ltd., 3-1-1 Saiwai-cho, Hitachi-shi, Ibaraki-ken, 317-0073 Japan
国际会议
上海
英文
859-868
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）