Design And Evaluation Of A High-Speed Aeroacoustic Wind Tunnel
During cruise flight, the main source of acoustic noise radiation
within the aircraft cabin occurs as a result of structural
vibrations of the flexible fuselage panels due to the random
pressure fluctuation field imposed by the Turbulent Boundary
Layer (TBL) . Conventional methods of describing these
interactions have relied on the use of various statistical semiempirical
models which predict the behavior of the TBL pressure
fluctuation spectrum. Each model however makes fairly
different predictions with regards to the spectrum in the various
frequency regions. There is therefore a need to not only
assess these inconsistencies with experimental methods, but
also to clarify the fundamental physical relationship between
the turbulent structures and the resulting fluctuation signature.
The present phase of this research initiative at Carleton University
involves the design and fabrication of the new High-
Speed Aeroacoustic Wind Tunnel (HSAWT), which is capable
of studying wall pressure fluctuation behavior at subsonic
flow speeds up to typical cruise flight conditions.
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