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There are a total of 49 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Takeoff/approach noise for a model counterrotation propeller with a forward-swept upstream rotor
Author(s): Woodward, Richard P.; Hall, David G.; Podboy, Gary G.; Jeracki, Robert J.
Abstract: A scale model of a counterrotating propeller with forward-swept blades in the forward rotor and aft-swept blades in the aft rotor (designated F39/A31) has been tested in the NASA Lewis 9- by 15-Foot Anechoic Wind Tunnel. ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 93N16715; Document ID: 19930007526; Report Number: AIAA PAPER 93-0596, E-7479, NAS 1.15:105979, NASA-TM-105979
Far-Field Acoustic Characteristics of Multiple Blade-Vane Configurations for a High Tip Speed Fan
Author(s): Woodward, Richard P.; Gazzaniga, John A.; Hughes, Christopher
Abstract: The acoustic characteristics of a model high-speed fan stage were measured in the NASA Glenn 9- by 15-Foot Low Speed Wind Tunnel at takeoff and approach flight conditions. The fan was designed for a corrected rotor tip speed ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2005-08-25
Document ID: 20040191565; Report Number: E-14568, NAS/1.15:2004-213093, NASA/TM-2004-213093
Fan Noise Source Diagnostic Test: Rotor Alone Aerodynamic Performance Results
Author(s): Hughes, Christopher E.; Jeracki, Robert J.; Woodward, Richard P.; Miller, Christopher J.
Abstract: The aerodynamic performance of an isolated fan or rotor alone model was measured in the NASA Glenn Research Center 9- by 15- Foot Low Speed Wind Tunnel as part of the Fan Broadband Source Diagnostic Test conducted at NASA ...
NASA Center: Glenn Research Center
Publication Year: 2005
Added to NTRS: 2005-08-25
Document ID: 20050175875; Report Number: AIAA Paper 2002-2426, E-13384, NASA/TM-2005-211681
In-flight near- and far-field acoustic data measured on the Propfan Test Assessment (PTA) testbed and with an adjacent aircraft
Author(s): Woodward, Richard P.; Loeffler, Irvin J.
Abstract: Flight tests to define the far-field tone source at cruise conditions were completed on the full-scale SR-7L advanced turboprop that was installed on the left wing of a Gulfstream 2 aircraft. This program, designated Propfan ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 93N27058; Document ID: 19930017869; Report Number: E-6402, NAS 1.15:103719, NASA-TM-103719
Noise Benefits of Increased Fan Bypass Nozzle Area
Author(s): Woodward, Richard P.; Hughes, Christopher E.
Abstract: An advanced model turbofan (typical of current engine technology) was tested in the NASA Glenn 9 by 15 Foot Low Speed Wind Tunnel (9-by 15-Foot LSWT) to explore far field acoustic effects of increased bypass nozzle area. ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2005-08-25
Document ID: 20050010186; Report Number: AIAA Paper 2005-1201, E-14899, NASA/TM-2004-213396
Benefits of Swept and Leaned Stators for Fan Noise Reduction
Author(s): Woodward, Richard P.; Elliott, David M.; Hughes, Christopher E.; Berton, Jeffrey J.
Abstract: An advanced high bypass ratio fan model was tested in the NASA Lewis Research Center 9 x 15-Foot Low Speed Wind Tunnel. The primary focus of this test was to quantify the acoustic benefits and aerodynamic performance of ...
NASA Center: Glenn Research Center
Publication Year: 1998
Added to NTRS: 2005-08-25
Document ID: 19990009566; Report Number: AIAA Paper 99-0479, E-11382, NAS 1.15:208661, NASA/TM-1998-208661
Comparison between design and installed acoustic characteristics of NASA Lewis 9- by 15-foot low-speed wind tunnel acoustic treatment
Author(s): Dahl, Milo D.; Woodward, Richard P.
Abstract: The test section of the NASA Lewis 9- by 15-Foot Low-Speed Wind Tunnel was acoustically treated to allow the measurement of sound under simulated free-field conditions. The treatment was designed for high sound absorption at ...
NASA Center: Glenn Research Center
Publication Year: 1990
Added to NTRS: 2005-08-25
Accession Number: 90N19242; Document ID: 19900009926; Report Number: E-4981, NAS 1.60:2996, NASA-TP-2996
Noise of a simulated installed model counterrotation propeller at angle-of-attack and takeoff/approach conditions
Author(s): Woodward, Richard P.
Abstract: Two modern high-speed advanced counterrotation propellers, F7/A7 and F7/A3 were tested in the NASA Lewis Research Center's 9- by 15-Foot Anechoic Wind Tunnel at simulated takeoff/approach conditions of 0.2 Mach. Both rotors ...
NASA Center: Glenn Research Center
Publication Year: 1990
Added to NTRS: 2005-08-25
Accession Number: 90N20794; Document ID: 19900011478; Report Number: AIAA PAPER 90-0283, E-5210, NAS 1.15:102440, NASA-TM-102440
Fan Noise Source Diagnostic Test: Far-Field Acoustic Results
Author(s): Woodward, Richard P.; Hughes, Christopher E.; Jeracki, Robert J.; Miller, Christopher J.
Abstract: A comprehensive model fan source diagnostic test was conducted in the NASA Glenn Research Center 9 x 15 Low Speed Wind Tunnel. Far field acoustic data were acquired at 0.10M, which is representative of aircraft ...
NASA Center: Glenn Research Center
Publication Year: 2002
Added to NTRS: 2005-08-25
Document ID: 20020082922; Report Number: AIAA Paper 2002-2427, E-13348, NAS 1.15:211591, NASA/TM-2002-211591
Inflight source noise of an advanced full-scale single-rotation propeller
Author(s): Woodward, Richard P.; Loeffler, Irvin J.
Abstract: Flight tests to define the far field tone source at cruise conditions were completed on the full scale SR-7L advanced turboprop which was installed on the left wing of a Gulfstream II aircraft. This program, designated ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 91N19045; Document ID: 19910009732; Report Number: AIAA PAPER 91-0594, E-5906, NAS 1.15:103687, NASA-TM-103687
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