Installation effects on propeller wake/vortex induced structure-borne noise transmissionA laboratory-based test apparatus was employed to investigate the effects of power-plant placement, engine/nacelle mass installation, and wing-to-fuselage attachment methods on propeller-induced structure-borne noise (SBN) transmission levels and their effects on noise-control measures. Data are presented showing SBN transmission is insensitive to propeller spanwise placement, however some sensitivity is seen in propeller-to-wing spacing. Installation of an engine/nacelle mass and variation in wing-to-fuselage attachments have measurable influences on SBN transmission and control measures.
Document ID
19890046346
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Unruh, J. F. (Southwest Research Institute San Antonio, TX, United States)