GAS TURBINE ENGINE HAVING CONFIGURABLE BYPASS PASSAGE

摘要

A gas turbine engine (50) is disclosed which includes a bypass passage (58) that in some embodiments is capable of being configured to act as a resonance space. The resonance space can be used to attenuate or accentuate a noise produced elsewhere. The bypass passage can be configured in a number of ways to form the resonance space. In one form the resonance space can attenuate a noise forward of the bypass duct. In another form the resonance space can. attenuate a noise aft of the bypass duct.