Woodward et al., 2006 - Google Patents

Fan noise reduction with increased bypass nozzle area

Woodward et al., 2006

Document ID
8505317742205131824
Author
Woodward R
Hughes C
Podboy G
Publication year
Publication venue
Journal of aircraft

External Links

Snippet

A model turbofan was tested in the NASA Glenn 9-by 15-ft low speed wind tunnel to explore far-field acoustic effects of a variable area bypass nozzle using three fixed nozzle flows. The baseline nozzle was sized to produce maximum stage performance at cruise condition …
Continue reading at arc.aiaa.org (other versions)

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or anti-vibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies
    • Y02T50/67—Relevant aircraft propulsion technologies
    • Y02T50/671—Measures to reduce the propulsor weight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/78—Other construction of jet pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
    • F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
    • F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
    • F02C7/045—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for noise suppression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function

Similar Documents

Publication Publication Date Title
Woodward et al. Benefits of swept-and-leaned stators for fan noise reduction
Woodward et al. Fan Noise Source Diagnostic Test--Far-field Acoustic Results
Hughes et al. Fan noise source diagnostic test-rotor alone aerodynamic performance results
Neise et al. Technology approach to aero engine noise reduction
Heidelberg Fan noise source diagnostic test-tone modal structure results
CN112664275A (en) Non-duct single-rotor engine
Heidelberg et al. Inlet acoustic mode measurements using a continuously rotating rake
Woodward et al. Noise benefits of increased fan bypass nozzle area
Woodward et al. Fan noise reduction with increased bypass nozzle area
Hughes et al. The effect of bypass nozzle exit area on fan aerodynamic performance and noise in a model turbofan simulator
Sutliff et al. Duct mode measurements on the TFE731-60 full scale engine
Woodward et al. Acoustic benefits of stator sweep and lean for a high tip speed fan
Woodward et al. Aeroacoustic analysis of fan noise reduction with increased bypass nozzle area
Hughes et al. Effect of tip clearance on fan noise and aerodynamic performance
Elliott et al. Acoustic performance of novel fan noise reduction technologies for a high bypass model turbofan at simulated flight conditions
Heidelberg Comparison of tone mode measurements for a forward swept and baseline rotor fan
Ginder et al. An Improved Correlation for the Broadband Noise of High-Speed Fans
Schwaller et al. Noise validation of model fan rig with engine
Weir et al. Flow measurements and multiple pure tone noise from a forward swept fan
Woodward et al. Far-field noise and internal modes from a ducted propeller at simulated aircraft takeoff conditions
Woodward Comparison of far-field noise for three significantly different model turbofans
Ishii et al. Experimental Study on Acoustic Performances of Notched Nozzle Using a Subscale Turbofan Engine
Sutliff Source Diagnostic Fan II (22") Duct Mode Characteristics as Measured by the Rotating Rake Mode Measurement System while Operated in the NASA Glenn 9x15 Low Speed Wind Tunnel
Shivashankara et al. Installation effects on counter rotating propeller noise
Lewy Semi-empirical prediction of tone noise due to counter-rotating open rotors