Title:
ACOUSTIC LINER WITH VARIED PROPERTIES
Document Type and Number:
WIPO Patent Application WO/2014/197035
Kind Code:
A3
Abstract:
A geared turbofan engine includes a first rotor, a fan, a second rotor, a gear train, a fan casing, a nacelle and a plurality of discrete acoustic liner segments. The fan is connected to the first rotor and is capable of rotation at frequencies between 200 and 6000 Hz and has a fan pressure ratio of between 1.25 and 1.60. The gear train connects the first rotor to the second rotor. The fan casing and nacelle are arranged circumferentially about a centerline and define a bypass flow duct in which the fan is disposed. The plurality of discrete acoustic liner segments with varied geometric properties are disposed along the bypass flow duct.
Inventors:
GILSON JONATHAN (US)
BALTAS CONSTANTINE (US)
BALTAS CONSTANTINE (US)
Application Number:
PCT/US2014/023024
Publication Date:
February 19, 2015
Filing Date:
March 11, 2014
Export Citation:
Assignee:
UNITED TECHNOLOGIES CORP (US)
International Classes:
F02C7/045; F01D25/24; F02C7/24
Foreign References:
| US20090162187A1 | 2009-06-25 | |||
| US20060169533A1 | 2006-08-03 | |||
| US5478199A | 1995-12-26 | |||
| US20100111675A1 | 2010-05-06 | |||
| US20100290892A1 | 2010-11-18 |
Other References:
See also references of EP 2971659A4
Attorney, Agent or Firm:
BERGMAN, Larrin et al. (Minneapolis, Minnesota, US)
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