ダクト内部音場に及ぼす並置矩形スリットの影響(G05-5 内部流れ・境界層(1),G05 流体工学部門一般講演)

概要

論文の詳細を見る
The sound field in a rectangular duct with symmetric two-branch slits placed side by side is computed by a finite difference method and the transmission characteristic is presented. The slit consists of duct expansions located on two opposite side of a duct with short axial length. At a specific frequency, that is, resonance frequency, the computed sound attenuation for the present side-by-side slits occurred largely, compared with the corresponding single two-branch slit or a single four-branch slit. The transmission coefficient fluctuates periodically with changing the axial distance of side-by-side slits. The phase difference between each wave within each slit under the resonance is about 1/4-period of the simple-harmonic sound wave.
社団法人日本機械学会の論文
2004-09-04