Sound reduction method and system for jet engines

G - Physics – 10 – K

Patent

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Details

G10K 11/178 (2006.01) B06B 1/20 (2006.01) B64D 29/00 (2006.01) B64D 47/00 (2006.01) G10K 15/04 (2006.01)

Patent

CA 2282744

A method and apparatus for reducing acoustic noise waves in the vicinity of an electrically conductive plasma, such as in the exhaust of a gas turbine engine (10), having a sensor (32) to detect the noise wave and generate a representative electrical noise signal; a signal analyzer to analyze the noise signal (36), a wave form generator (38) to generate a phase inverted, electrical interference signal based on the noise signal, an amplifier (42), a time delay (46), an error corrector (48); and an applying means to conduct the electrical interference signal to the plasma causing the plasma to generate a pulsating interference wave to cancel the acoustic noise wave.

L'invention concerne un procédé et un dispositif permettant de réduire les ondes de bruit acoustique à proximité d'un plasma électriquement conducteur, par exemple, dans le gaz d'échappement d'une turbine à gaz. Ledit dispositif est doté d'un détecteur permettant de déceler l'onde de bruit et de générer un signal électrique de bruit représentatif des ondes de bruit; un analyseur de signaux permettant d'analyser le signal de bruit, un générateur de forme d'onde permettant de générer un signal d'interférence électrique à phase inversée basé sur le signal de bruit, un amplificateur, un retard de temps, un correcteur d'erreurs; et un moyen d'application permettant de conduire le signal d'interférence électrique vers le plasma qui génère ainsi une onde d'interférence pulsatoire en vue de supprimer l'onde de bruit acoustique.

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