United Technologies Corporation

Anil Prasad

Oliver V Atassi

Dilip Prasad

John Michael Feiereisen

A ducthas circumferentially distributed features capable of scattering acoustic energy associated with fluid dynamic shocksextending in a shock orientation direction D. Each feature is oriented, over at least a portion of its length, substantially perpendicular to the shock orientation direction. The features may be splicesused to connect segments of an acoustic liner, partitionsin a stability enhancing casing treatment, or other features capable of scattering acoustic energy associated with shocks.

Duct for reducing shock related noise

A method for determining how well configurations for a gas turbine propulsion system attain selected acoustic wave energy emissions criteria based on acquiring a plurality of acoustic frequency spectra representations of a noise representation therefor over an operating duration. Relative peaks in the acoustic frequency spectra representations are then located and the forms of at least one of those peaks is altered with respect to acoustic frequency in manners substantially matching acoustic wave energy emissions changes corresponding to configuration changes in gas turbine propulsion systems which are then evaluated to provide an operating parameter noise value. One of those operating parameter noise values that best meets the selected acoustic wave energy emissions criteria is used to aid in determining corresponding configurations changes to thereby better meet those criteria. This foregoing method can be incorporated into a process for determining an overall configuration for a gas turbine propulsion system.

Growing community of inventors

Vernon, CT, United States of America

Anil Prasad