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Stochastic Analysis Of Spectral Broadening By A Free Turbulent Shear Layer
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724721242 Total Pages :28 pages Book Rating :4.7/5 (212 download)
Book Synopsis Stochastic Analysis of Spectral Broadening by a Free Turbulent Shear Layer by : National Aeronautics and Space Administration (NASA)
Download or read book Stochastic Analysis of Spectral Broadening by a Free Turbulent Shear Layer written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-06 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of the time-varying shear layer between a harmonic acoustic source and an observer on the frequency content of the observed sound is considered. Experimental data show that the spectral content of the acoustic signal is considerably broadened upon passing through such a shear layer. Theoretical analysis is presented which shows that such spectral broadening is entirely consistent with amplitude modulation of the acoustic signal by the time-varying shear layer. Thus, no actual frequency shift need be hypothesized to explain the spectral phenomenon. Experimental tests were conducted at 2, 4, and 6 kHz and at free jet flow velocities of 10, 20, and 30 m/s. Analysis of acoustic pressure time histories obtained from these tests confirms the above conclusion, at least for the low Mach numbers considered. Hardin, J. C. and Preisser, J. S. Langley Research Center NASA-TP-1816, L-14444
Book Synopsis Stochastic Analysis of Spectral Broadening by a Free Turbulent Shear Layer by : Jay C. Hardin
Download or read book Stochastic Analysis of Spectral Broadening by a Free Turbulent Shear Layer written by Jay C. Hardin and published by . This book was released on 1981 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stochastic Analysis of Spectral Broadening by a Free Turbulent Shear Layer by : Jay C. Hardin
Download or read book Stochastic Analysis of Spectral Broadening by a Free Turbulent Shear Layer written by Jay C. Hardin and published by . This book was released on 1981 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Flight Test of a Pure-tone Acoustic Source by : Arnold W. Mueller
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Book Synopsis Publications on Acoustics Research at the Langley Research Center During 1980-1986 by :
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