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Measurements Of Atmospheric Turbulence Effects On Tail Rotor Acoustics
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722632342 Total Pages :82 pages Book Rating :4.6/5 (323 download)
Book Synopsis Measurements of Atmospheric Turbulence Effects on Tail Rotor Acoustics by : National Aeronautics and Space Administration (NASA)
Download or read book Measurements of Atmospheric Turbulence Effects on Tail Rotor Acoustics written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from an outdoor hover test of a full-scale Lynx tail rotor are presented. The investigation was designed to further the understanding of the acoustics of an isolated tail rotor hovering out-of-ground effect in atmospheric turbulence, without the effects of the main rotor wake or other helicopter components. Measurements include simultaneous rotor performance, noise, inflow, and far-field atmospheric turbulence. Results with grid-generated inflow turbulence are also presented. The effects of atmospheric turbulence ingestion on rotor noise are quantified. In contradiction to current theories, increasing rotor inflow and rotor thrust were found to increase turbulence ingestion noise. This is the final report of Task 13A--Helicopter Tail Rotor Noise, of the NASA/United Kingdom Defense Research Agency cooperative Aeronautics Research Program. Hagen, Martin J. and Yamauchi, Gloria K. and Signor, David B. and Mosher, Marianne Ames Research Center...
Book Synopsis Measurements of Atmospheric Turbulence Effects on Tail Rotor Acoustics by :
Download or read book Measurements of Atmospheric Turbulence Effects on Tail Rotor Acoustics written by and published by . This book was released on 1994 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of Atmosopheric Turbulence Effects on Tail Rotor Acoustics by : Martin J. Hagen
Download or read book Measurements of Atmosopheric Turbulence Effects on Tail Rotor Acoustics written by Martin J. Hagen and published by . This book was released on 1994 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1963 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research and Technology Annual Report by : Earth Resources Laboratory (U.S.)
Download or read book Research and Technology Annual Report written by Earth Resources Laboratory (U.S.) and published by . This book was released on 1987 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Technology, 1990 written by and published by . This book was released on 1990 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard
Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325) by :
Download or read book Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325) written by and published by . This book was released on 1995 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1991 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in Aeroacoustics by : A. Krothapalli
Download or read book Recent Advances in Aeroacoustics written by A. Krothapalli and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Joint Institute for Aeronautics and Acoustics at Stanford University was established in October 1973 to provide an academic environment for long-term cooperative research between Stanford and NASA Ames Research Center. Since its establishment, the Institute has conducted theoretical and experimental work in the areas of aerodynamics, acoustics, fluid mechanics, flight dynamics, guidance and control, and human factors. This research has involved Stanford faculty, research associates, graduate students, and many distinguished visitors in collaborative efforts with the research staff of NASA Ames Research Center. The occasion of the Institute's tenth anniversary was used to reflect back on where that research has brought us, and to consider where our endeavors should be directed next. Thus, an International Symposium was held to review recent advances in the fields relevant to the activities of the Institute and to discuss the areas of research to be undertaken in the future. This anniversary was also chosen as an opportunity to honor one of the Institute's founders and its director, Professor Krishnamurty Karamcheti. It has been his crea tive inspiration that has provided the ideal research environment at the Joint Institute.
Download or read book Aeronautical Engineering written by and published by . This book was released on 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uncorrelated Noise in Turbulence Measurements by : D. H. Lenschow
Download or read book Uncorrelated Noise in Turbulence Measurements written by D. H. Lenschow and published by . This book was released on 1985 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of measurements. Theoretical considerations. Numerical noise simulation. Measurement of aerosols. Effects on spectra and structure functions.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Large and Small Scale Turbulence on Sound Propagation in the Atmosphere by :
Download or read book The Effects of Large and Small Scale Turbulence on Sound Propagation in the Atmosphere written by and published by . This book was released on 1995 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propagation of acoustic waves in the atmosphere is affected by several mechanisms. Two of the effects are the scattering of sound by small-scale atmospheric turbulence and fluctuation of the speed of sound gradients by the passage of large-scale atmospheric turbulence. Small- and large-scale atmospheric turbulence causes the acoustic waves to be altered by different mechanisms. Until recently, the majority of work in turbulence effect on acoustics has concentrated on the small-scale turbulence regime of the inertial subrange of the Kolmogorov spectrum. Earlier small-scale turbulence models have concentrated on the statistical-based work of Tatarski. Current turbulence models deal more with the structural nature of the turbulence because the statistical approach does not account for all of the turbulence effects being measured during acoustic propagation experiments. The large-scale turbulence problem cannot be handled very well with a statistical approach to atmospheric turbulence because the regime of the large-scale turbulence extends into the energy containing subrange or sometimes referred to as the source region. This report discusses the current and past turbulence models used to treat the effect of small- and large-scale turbulence on atmospheric acoustic propagation. (AN).
Author :David Rudolf Polak Publisher :Ann Arbor, Mich. : University Microfilms International ISBN 13 : Total Pages :634 pages Book Rating :4.E/5 ( download)
Book Synopsis Experimental and Computational Investigation of Tilt Rotor Hover Aeroacoustics by : David Rudolf Polak
Download or read book Experimental and Computational Investigation of Tilt Rotor Hover Aeroacoustics written by David Rudolf Polak and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1996 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
