Record Display for the EPA National Library Catalog


Main Title Turbulence Induced Noise in a Single Stage Axial Flow Fan.
Other Authors
Author Title of a Work
Robbins, Basil Edmond, II.
Publisher Defense Technical Information Center,
Year Published 1974
Report Number TM-74-157; AD-A009 232; N00017-73-C-1418
OCLC Number 907255242
Subjects Turbulent flow. ; Acoustic emissions. ; Axial flow fans. ; Turbulence. ; Noise pollution. ; Turbomachinery. ; Compressor blades. ; Cascades(fluid dynamics) ; Acoustics. ; Jet and Gas Turbine Engines.
Library Call Number Additional Info Location Last
EKBD  AD-A009 232 Microfiche collection Research Triangle Park Library/RTP, NC 04/21/2015
Collation 127 pages
"AD-A009 232." "TM-74-157." "N00017-73-C-1418." "Filmed 6-9-75 NTIS." Microfiche.
Contents Notes
The sound generated by the interaction of inlet turbulence with a rotating compressor blade row is investigated. Currently, there are two theories relating the rotor geometry and blade aerodynamics to the spectrum of the radiated sound. These theories are extended to include the cascade effect by incorporating a cascade aerodynamic response function for the unsteady lift on the blades into their analyses. To experimentally study this noise source, an aeroacoustic fan facility was designed and built. The parameters investigated include turbulence intensity and longitudinal integral length scale, blade speed, flow coefficient, and blade spacing.