公开(公告)号：US10578016B2

公开(公告)日：2020-03-03

申请号：US15452619

申请日：2017-03-07

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Derek J. Michaels ,  Dilip Prasad

IPC: F01D25/04 ,  F02C7/045 ,  F02C7/057 ,  F01D25/06 ,  F01D5/26 ,  F02C9/00 ,  B64D33/02

Abstract: Disclosed is a flutter damper, including an acoustic liner configured for peak acoustical energy absorption at a frequency range that is greater than a frequency range associated with fan flutter, a chamber, and a piezoelectric element disposed within a first surface of the chamber, and the chamber being configured for peak acoustical energy absorption at a frequency range that is associated with one or more fan flutter modes, and wherein the piezoelectric element is operatively connected to an electronic engine control.

公开(公告)号：US20180258855A1

公开(公告)日：2018-09-13

申请号：US15452619

申请日：2017-03-07

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Derek J. Michaels ,  Dilip Prasad

IPC: F02C7/045 ,  F02C7/057 ,  F01D25/06

CPC classification number: F02C7/045 ,  B64D2033/0206 ,  F01D5/26 ,  F01D25/06 ,  F02C7/057 ,  F02C9/00 ,  F05D2220/36 ,  F05D2260/96 ,  F05D2260/962 ,  F05D2270/44 ,  F05D2270/62 ,  F05D2270/80 ,  Y02T50/672

Abstract: Disclosed is a flutter damper, including an acoustic liner configured for peak acoustical energy absorption at a frequency range that is greater than a frequency range associated with fan flutter, a chamber, and a piezoelectric element disposed within a first surface of the chamber, and the chamber being configured for peak acoustical energy absorption at a frequency range that is associated with one or more fan flutter modes, and wherein the piezoelectric element is operatively connected to an electronic engine control.