DEVICE FOR EJECTING GAS FROM A GAS TURBINE ENGINE AND GAS TURBINE ENGINE
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United States of America Patent
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Issued Date -
Jan 3, 2013
app pub date -
Feb 9, 2011
filing date -
Feb 12, 2010
priority date (Note) -
Abandoned
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Abstract
A device for ejecting gas from a gas turbine engine, which includes: an outer wall and an inner wall defining a gas flow path therebetween, the inner wall forming a central body defining an inner cavity, the outer wall being perforated and communicating with at least one outer resonance cavity for attenuating noise in a first range of sound frequencies; and a mechanism for placing the outer and inner cavities in fluid communication, extending through the gas flow path, the inner cavity thus forming a resonance cavity for attenuating the noise in a second range of sound frequencies. The device can, for example, be used to attenuate two ranges of sound frequencies.
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