The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2012
Filed:
Jan. 30, 2008
Robert Hans Schlinker, Canton, CT (US);
James C. Napier, San Diego, CA (US);
David R. Polak, Glastonbury, CT (US);
Ray-sing Lin, Glastonbury, CT (US);
Scott A. Liljenberg, Wethersfield, CT (US);
Anthony C. Jones, San Diego, CA (US);
Robert Hans Schlinker, Canton, CT (US);
James C. Napier, San Diego, CA (US);
David R. Polak, Glastonbury, CT (US);
Ray-Sing Lin, Glastonbury, CT (US);
Scott A. Liljenberg, Wethersfield, CT (US);
Anthony C. Jones, San Diego, CA (US);
Hamilton Sundstrand Corporation, Rockford, IL (US);
Abstract
A system for reducing compressor noise includes a rotor having a plurality of blades. The blades have a nominal geometry characterized by a blade parameter. At least some of the blades are mistuned, such that they differ from the nominal geometry by greater than a manufacturing tolerance in the blade parameter. The blades produce shock waves at a blade passing frequency, and the mistuned blades shift acoustic energy away from the blade passing frequency to multiple lower amplitude tones at other frequencies. The system is configurable to be deployed with an inlet silencer that preferentially absorbs acoustic energy at some of the shifted frequencies.