12th AIAA/CEAS Aeroacoustics Conference (27th AIAA Aeroacoustics Conference) 2006
DOI: 10.2514/6.2006-2458
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Quiet Technology Demonstrator 2 Intake Liner Design and Validation

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Cited by 24 publications
(6 citation statements)
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“…Specifically, Astley et al [39] showed, using finite-element solutions of the wave propagation problem, that the extended liner "does not behave simply as an extension to the cylindrical barrel liner." Further, the benefits of this liner configuration were demonstrated in flight tests reported by Yu et al [40] and in tests on a 1/3-scale fan rig by Gantie et al [41]. The present investigation complements these earlier studies by establishing a physical rationale for the observed behavior.…”
Section: Discussionsupporting
confidence: 75%
“…Specifically, Astley et al [39] showed, using finite-element solutions of the wave propagation problem, that the extended liner "does not behave simply as an extension to the cylindrical barrel liner." Further, the benefits of this liner configuration were demonstrated in flight tests reported by Yu et al [40] and in tests on a 1/3-scale fan rig by Gantie et al [41]. The present investigation complements these earlier studies by establishing a physical rationale for the observed behavior.…”
Section: Discussionsupporting
confidence: 75%
“…Finally, the lip liner is integrated with the nose cone to limit aero performance losses [32]. The technology is a result of collaboration between Boeing and Goodrich Aerostructures, and the investigators showed reductions of inlet radiated fan noise of up to 13dB [32]. However, per discussions with NASA researchers during ERA technology workshops, the noise reduction applied is -3dB on approach and -1dB on takeoff.…”
Section: Nose Lip Linermentioning
confidence: 98%
“…This reduces the scatter of tonal noise. Finally, the lip liner is integrated with the nose cone to limit aero performance losses [32]. The technology is a result of collaboration between Boeing and Goodrich Aerostructures, and the investigators showed reductions of inlet radiated fan noise of up to 13dB [32].…”
Section: Nose Lip Linermentioning
confidence: 99%
“…The PAA T-fan chevron nozzle was tested with and without the core chevron nozzle in configurations 2 and 4 providing for the determination of the possible interaction effect of the fan and core chevrons. Both of these configurations included an Acoustically Smooth Inlet (ASI) that removed liner splices, moved the acoustic liner closer to the fan rotor, and added a lip liner 15 . The baseline nozzles were tested on both Configs.…”
Section: Flight Test Configurationsmentioning
confidence: 99%