Title:
DEVICE FOR SOUNDPROOFING GAS TURBINE HELICOPTER ENGINE AND ENGINE OBTAINED USING THE SAME
Document Type and Number:
Japanese Patent JP2008075648
Kind Code:
A
Abstract:
To solve problems of a gas turbine helicopter engine in which a thickness of coating forming an acoustic attenuator occupies a significant volume to negatively affect a size of the engine, and a design change such that the engine, in particular, a metal casing thereof accommodates the acoustic attenuator is required.
In the gas turbine helicopter engine, lips 30, 32 defining a radial air intake 34 are connected along an opening 12a of an engine compressor air supply passage 12. The air intake lips are at least partially formed by sound attenuators 40, 42 calculated to attenuate sound frequencies produced by a compressor rotation.
Inventors:
BAUDE PIERRE
Application Number:
JP2007238861A
Publication Date:
April 03, 2008
Filing Date:
September 14, 2007
Export Citation:
Assignee:
TURBOMECA
International Classes:
F02C7/045; F02C7/00; F02C7/055
Domestic Patent References:
| JPS50155000A | 1975-12-13 | |||
| JPH03260336A | 1991-11-20 | |||
| JP2004150367A | 2004-05-27 | |||
| JP2876000B1 | 1999-03-31 | |||
| JPS523915A | 1977-01-12 |
Foreign References:
| US4421455A | 1983-12-20 |
Attorney, Agent or Firm:
Yoshio Kawaguchi
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura