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Acoustic Quality Of The 40 By 80 Foot Wind Tunnel Test Section After Installation Of A Deep Acoustic Lining
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721139262 Total Pages :132 pages Book Rating :4.1/5 (392 download)
Book Synopsis Acoustic Quality of the 40- By 80- Foot Wind Tunnel Test Section After Installation of a Deep Acoustic Lining by : National Aeronautics and Space Administration (NASA)
Download or read book Acoustic Quality of the 40- By 80- Foot Wind Tunnel Test Section After Installation of a Deep Acoustic Lining written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: A recessed, 42-inch deep acoustic lining has been designed and installed in the 40- by 80- Foot Wind Tunnel (40x80) test section to greatly improve the acoustic quality of the facility. This report describes the test section acoustic performance as determined by a detailed static calibration-all data were acquired without wind. Global measurements of sound decay from steady noise sources showed that the facility is suitable for acoustic studies of jet noise or similar randomly generated sound. The wall sound absorption, size of the facility, and averaging effects of wide band random noise all tend to minimize interference effects from wall reflections. The decay of white noise with distance was close to free field above 250 Hz. However, tonal sound data from propellers and fans, for example, will have an error band to be described that is caused by the sensitivity of tones to even weak interference. That error band could be minimized by use of directional instruments such as phased microphone arrays. Above 10 kHz, air absorption began to dominate the sound field in the large test section, reflections became weaker, and the test section tended toward an anechoic environment as frequency increased. Soderman, Paul T. and Jaeger, Stephen M. and Hayes, Julie A. and Allen, Christopher S. Ames Research Center 519-20-32
Book Synopsis Acoustic Quality of the 40- by 80-foot Wind Tunnel Test Section After Installation of a Deep Acoustic Lining by : Paul T. Soderman
Download or read book Acoustic Quality of the 40- by 80-foot Wind Tunnel Test Section After Installation of a Deep Acoustic Lining written by Paul T. Soderman and published by . This book was released on 2002 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Design of Test-section Inserts for Higher Speed Aeroacoustic Testing in the Ames 80- by 120-foot Wind Tunnel by :
Download or read book The Design of Test-section Inserts for Higher Speed Aeroacoustic Testing in the Ames 80- by 120-foot Wind Tunnel written by and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modification of the Ames 40- by 80-foot Wind Tunnel for Component Acoustic Testing for the Second Generation Supersonic Transport by : F. H. Schmitz
Download or read book Modification of the Ames 40- by 80-foot Wind Tunnel for Component Acoustic Testing for the Second Generation Supersonic Transport written by F. H. Schmitz and published by . This book was released on 1994 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722386313 Total Pages :42 pages Book Rating :4.3/5 (863 download)
Book Synopsis Modification of the Ames 40- By 80-Foot Wind Tunnel for Component Acoustic Testing for the Second Generation Supersonic Transport by : National Aeronautics and Space Administration (NASA)
Download or read book Modification of the Ames 40- By 80-Foot Wind Tunnel for Component Acoustic Testing for the Second Generation Supersonic Transport written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-05 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a large-scale anechoic test facility where large models of engine/airframe/high-lift systems can be tested for both improved noise reduction and minimum performance degradation is described. The facility development is part of the effort to investigate economically viable methods of reducing second generation high speed civil transport noise during takeoff and climb-out that is now under way in the United States. This new capability will be achieved through acoustic modifications of NASA's second largest subsonic wind tunnel: the 40-by 80-Foot Wind Tunnel at the NASA Ames Research Center. Three major items are addressed in the design of this large anechoic and quiet wind tunnel: a new deep (42 inch (107 cm)) test section liner, expansion of the wind tunnel drive operating envelope at low rpm to reduce background noise, and other promising methods of improving signal-to-noise levels of inflow microphones. Current testing plans supporting the U.S. high speed civil transport program are also outlined. Schmitz, F. H. and Allmen, J. R. and Soderman, P. T. Ames Research Center RTOP 505-38-13...
Book Synopsis NASA Technical Paper by : United States. National Aeronautics and Space Administration
Download or read book NASA Technical Paper written by United States. National Aeronautics and Space Administration and published by . This book was released on 1990 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Paper written by and published by . This book was released on 1990 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic Measurement Study 40 by 80 Foot Subsonic Wind Tunnel by :
Download or read book Acoustic Measurement Study 40 by 80 Foot Subsonic Wind Tunnel written by and published by . This book was released on 1974 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Feasibility of Making Model Acoustic Measurements in the NASA Ames 40-by 80-foot Wind Tunnel by :
Download or read book Investigation of the Feasibility of Making Model Acoustic Measurements in the NASA Ames 40-by 80-foot Wind Tunnel written by and published by . This book was released on 1971 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large-scale Aeroacoustic Research Feasibility and Conceptual Design of Test-section Inserts for the Ames 80- by 120-foot Wind Tunnel by : Paul T. Soderman
Download or read book Large-scale Aeroacoustic Research Feasibility and Conceptual Design of Test-section Inserts for the Ames 80- by 120-foot Wind Tunnel written by Paul T. Soderman and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Instrument Society of America. Aerospace Industry Division Publisher : ISBN 13 :9781556175510 Total Pages :734 pages Book Rating :4.1/5 (755 download)
Book Synopsis Proceedings of the 41st International Instrumentation Symposium by : Instrument Society of America. Aerospace Industry Division
Download or read book Proceedings of the 41st International Instrumentation Symposium written by Instrument Society of America. Aerospace Industry Division and published by . This book was released on 1995 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modification of the Ames 40- by 80-Foot Wind Tunnel For Component Acoustic Testing For ..., (NASA-TM-108850), October 1994 by :
Download or read book Modification of the Ames 40- by 80-Foot Wind Tunnel For Component Acoustic Testing For ..., (NASA-TM-108850), October 1994 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DGLR/AIAA 14th Aeroacoustics Conference by : Hanno H.. Heller
Download or read book DGLR/AIAA 14th Aeroacoustics Conference written by Hanno H.. Heller and published by . This book was released on 1992 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Acoustic Data from a 102 Mm Conic Nozzle as Measured in the RAE 24-foot Wind Tunnel and the NASA Ames 40- by 80-foot Wind Tunnel by :
Download or read book Comparison of Acoustic Data from a 102 Mm Conic Nozzle as Measured in the RAE 24-foot Wind Tunnel and the NASA Ames 40- by 80-foot Wind Tunnel written by and published by . This book was released on 1982 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustical Evaluation of the NASA Lewis 9 by 15 Foot Low Speed Wind Tunnel by : Milo D. Dahl
Download or read book Acoustical Evaluation of the NASA Lewis 9 by 15 Foot Low Speed Wind Tunnel written by Milo D. Dahl and published by . This book was released on 1992 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large-scale Aeroacoustic Research Feasibility and Conceptual Design of Test-section Inserts for the Ames 80- by 120-foot Wind Tunnel by : Paul T. Soderman
Download or read book Large-scale Aeroacoustic Research Feasibility and Conceptual Design of Test-section Inserts for the Ames 80- by 120-foot Wind Tunnel written by Paul T. Soderman and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Verti-flite written by and published by . This book was released on 1994 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
