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1. (WO2018037456) SOUND-ABSORBING LINER

Pub. No.:    WO/2018/037456    International Application No.:    PCT/JP2016/074397
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Tue Aug 23 01:59:59 CEST 2016
IPC: F02K 1/34
F02C 7/24
Applicants: IHI CORPORATION
株式会社IHI
Inventors: OISHI Tsutomu
大石 勉
OBA Yoshinori
大庭 芳則
KAGAYA Ryou
加賀谷 諒
Title: SOUND-ABSORBING LINER
Abstract:
A through hole 31 in a sound-absorbing liner 100 is inclined toward the upstream side from the front surface to the back surface of a porous plate 33. Thus, the direction of vibration VL of a hole fluid is inclined in accordance with the through hole 31 (inclined by 135° herein). At this time, the magnitude of the particle velocity along the through hole 31 is V. On the other hand, among the velocity components of the hole fluid, the magnitude of the velocity component in the plate thickness direction (i.e., the momentum) which affects a main flow boundary layer is expressed as V/√2. This value is smaller than V which is the velocity component in the plate thickness direction according to a comparative example. Thus, the influence that the vibration of the hole fluid in the through hole 31 has on disturbance in the main flow is suppressed compared to the comparative example.