Acoustic and aerodynamic performance of a 6-foot-diameter fan for turbofan engines: Design of facility and QF-1 fan
Bruce R. Leonard, United States. National Aeronautics and Space Administration, Lewis Research Center
National Aeronautics and Space Administration, 1970 - Music - 31 pages
Design of test facility and prototype fan for turbofan acoustic research.
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221 First torsion acoustic assembly axial bellmouth blade r8 building wall bypass ratio carbon content coarse uranium nitride cold isostatically pressed cracking decibels dense density and grain design corrected speed diameter downstream drive motor ducting effects of sintering electric discharge machining electron beam welded engine extrusion fabricated flow frequency fuel grain size hertz high purity hot isostatic pressing hydrofluoric acid inches inlet Lewis Research Center located Mach number machining measurements method microphones Microstructures molybdenum NASA nitrogen noise oxygen oxygen content particles percent of theoretical percent Zr phase porosity powder lots ppm for lot pressed and sintered pressed compacts produced QF-1 fan quiet fan radial rake rotor rotor blade samples shaft shown in figure sintered compacts sintered UN compacts sintering temperature sound pressure levels station stator blades strain gages stream of blade test facility test fan Third bending total-pressure trailing edge Uranium mononitride uranium nitride powder viaduct