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1. (WO2018037462) SOUND-ABSORBING LINER

Pub. No.:    WO/2018/037462    International Application No.:    PCT/JP2016/074409
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:
In this sound-absorbing liner 100, a through hole 31 is inclined toward the downstream side from the front surface 33a to the rear surface 33b of a porous plate 33. With this configuration, the flow of gas is restrained from impinging on a hole wall surface and flows smoothly into the through hole, and thus, a region in which static pressure increases in the vicinity of an inlet of the through hole 31 is reduced. Since this region is reduced, inflow and outflow occur over a wide area in the vicinity of the inlet of the through hole 31, and therefore, the flow from the through hole 31 becomes gentle and the influence of the gas flow G on a boundary layer is reduced. Thus, an increase in the thickness of the boundary layer can be suppressed, and thereby, pressure loss can be reduced and the performance of a jet engine 1 can be improved.