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There are a total of 19 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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An Assessment of Current Fan Noise Prediction Capability
Author(s): Envia, Edmane; Woodward, Richard P.; Elliott, David M.; Fite, E. Brian; Hughes, Christopher E.; Podboy, Gary G.; Sutliff, Daniel L.
Abstract: In this paper, the results of an extensive assessment exercise carried out to establish the current state of the art for predicting fan noise at NASA are presented. Representative codes in the empirical, analytical, and ...
NASA Center: Glenn Research Center
Publication Year: 2008
Added to NTRS: 2009-01-15
Document ID: 20090001307; Report Number: E-16579, NASA/TM-2008-215415
Foam-Metal Liner Attenuation of Low-Speed Fan Noise
Author(s): Sutliff, Daniel L.; Jones, Michael G.
Abstract: A foam-metal liner for attenuation of fan noise was developed for and tested on a low speed fan. This type of liner represents a significant advance over traditional liners due to the possibility for placement in close ...
NASA Center: Glenn Research Center, Langley Research Center
Publication Year: 2008
Added to NTRS: 2008-11-14
Document ID: 20080043610; Report Number: AIAA Paper 2008-2897, E-16514, NASA/TM-2008-215227
Estimation of the Unsteady Aerodynamic Load on Space Shuttle External Tank Protuberances from a Component Wind Tunnel Test
Author(s): Panda, Jayatana; Martin, Fred W.; Sutliff, Daniel L.
Abstract: At the wake of the Columbia (STS-107) accident it was decided to remove the Protuberance Aerodynamic Load (PAL) Ramp that was originally intended to protect various protuberances outside of the Space Shuttle External Tank ...
NASA Center: Glenn Research Center, Johnson Space Center
Publication Year: 2008
Added to NTRS: 2008-07-24
Document ID: 20080018469; Report Number: AIAA Paper 2008-0232, E-16380, NASA/TM--2008-215155
Vibration Analysis of the Space Shuttle External Tank Cable Tray Flight Data With and Without PAL Ramp
Author(s): Walker, Bruce E.; Panda, Jayanta; Sutliff, Daniel L.
Abstract: External Tank Cable Tray vibration data for three successive Space Shuttle flights were analyzed to assess response to buffet and the effect of removal of the Protuberance Air Loads (PAL) ramp. Waveform integration, spectral ...
NASA Center: Glenn Research Center
Publication Year: 2008
Added to NTRS: 2008-07-24
Document ID: 20080018471; Report Number: AIAA Paper 2008-312, E-16379, NASA/TM--2008-215156
Shock Characteristics Measured Upstream of Both a Forward-Swept and an Aft-Swept Fan
Author(s): Podboy, Gary G.; Krupar, Martin J.; Sutliff, Daniel L.; Horvath, Csaba
Abstract: Three different types of diagnostic data-blade surface flow visualization, shroud unsteady pressure, and laser Doppler velocimeter (LDV)--were obtained on two fans, one forward-swept and one aft-swept, in order to learn more ...
NASA Center: Glenn Research Center
Publication Year: 2007
Added to NTRS: 2007-12-11
Document ID: 20070035072; Report Number: E-16112, GT2007-27338, NASA/TM-2007-214935
Numerical Technique for Analyzing Rotating Rake Mode Measurements in a Duct With Passive Treatment and Shear Flow
Author(s): Dahl, Milo D.; Sutliff, Daniel L.
Abstract: A technique is presented for the analysis of measured data obtained from a rotating microphone rake system. The system is designed to measure the interaction modes of ducted fans. A Fourier analysis of the data from the ...
NASA Center: Glenn Research Center
Publication Year: 2007
Added to NTRS: 2007-10-23
Document ID: 20070030300; Report Number: AIAA Paper 2007-3679, E-16130, NASA/TM-2007-214966
Rotating Rake Mode Measurements Over Passive Treatment in a Ducted Fan
Author(s): Sutliff, Daniel L.
Abstract: The NASA Glenn Research Center s Rotating Rake mode measurement system has been successful in measuring the modal content propagating in hardwall ducts. This paper proposes an extension of the Rotating Rake measurement and ...
NASA Center: Glenn Research Center
Publication Year: 2006
Added to NTRS: 2007-03-07
Document ID: 20070004905; Report Number: E-15785, IN06-558, NASA/TM-2006-214493
Rotating Rake Turbofan Duct Mode Measurement System
Author(s): Sutliff, Daniel L.
Abstract: An experimental measurement system was developed and implemented by the NASA Glenn Research Center in the 1990s to measure turbofan duct acoustic modes. The system is a continuously rotating radial microphone rake that is ...
NASA Center: Glenn Research Center
Publication Year: 2005
Added to NTRS: 2006-08-02
Document ID: 20050237891; Report Number: E-15187, NASA/TM-2005-213828
Comparison of Predicted Low Speed Fan Rotor/Stator Interaction Modes to Measured
Author(s): Sutliff, Daniel L.; Bridges, James; Envia, Edmane
Abstract: The V072 Rotor Wake/Stator Interaction Code is widely used as a state-of-the-art prediction code. This paper validates the code by comparing experimentally measured mode levels to those predicted by V072. The experimental ...
NASA Center: Glenn Research Center
Publication Year: 1996
Added to NTRS: 2005-08-25
Accession Number: 97N19839; Document ID: 19970017675; Report Number: AIAA Paper 97-1609, E-10748, NAS 1.15:107462, NASA-TM-107462
Azimuthal Directivity of Fan Tones Containing Multiple Modes
Author(s): Heidelberg, Laurence J.; Sutliff, Daniel L.; Nallasamy, M.
Abstract: The directivity of fan tone noise is generally measured and plotted in the sideline or flyover plane and it is assumed that this curve is the same for all azimuthal angles. When two or more circumferential (m-order) modes of ...
NASA Center: Glenn Research Center
Publication Year: 1997
Added to NTRS: 2005-08-25
Accession Number: 97N25397; Document ID: 19970026029; Report Number: AIAA Paper 97-1587, E-10750, NAS 1.15:107464, NASA-TM-107464
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