The Effects of Profiles on Supersonic Jet Noise PDF Download
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Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781728712550
Category : Science
Languages : en
Pages : 40
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Book Description
The effect of velocity profiles on supersonic jet noise are studied by using stability calculations made for a shock-free coannular jet, with both the inner and outer flows supersonic. The Mach wave emission process is modeled as the noise generated by the large scale turbulent structures or the instability waves in the mixing region. Both the vortex-sheet and the realistic finite thickness shear layer models are considered. The stability calculations were performed for both inverted and normal velocity profiles. Comparisons are made with the results for an equivalent single jet, based on equal thrust, mass flow rate and exit area to that of the coannular jet. The advantages and disadvantages of these velocity profiles as far as noise radiation is concerned are discussed. It is shown that the Rayleigh's model prediction of the merits and demerits of different velocity profiles are in good agreement with the experimental data. Tiwari, S. N. and Bhat, T. R. S. Unspecified Center NAG1-1581
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781728712550
Category : Science
Languages : en
Pages : 40
Get Book Here
Book Description
The effect of velocity profiles on supersonic jet noise are studied by using stability calculations made for a shock-free coannular jet, with both the inner and outer flows supersonic. The Mach wave emission process is modeled as the noise generated by the large scale turbulent structures or the instability waves in the mixing region. Both the vortex-sheet and the realistic finite thickness shear layer models are considered. The stability calculations were performed for both inverted and normal velocity profiles. Comparisons are made with the results for an equivalent single jet, based on equal thrust, mass flow rate and exit area to that of the coannular jet. The advantages and disadvantages of these velocity profiles as far as noise radiation is concerned are discussed. It is shown that the Rayleigh's model prediction of the merits and demerits of different velocity profiles are in good agreement with the experimental data. Tiwari, S. N. and Bhat, T. R. S. Unspecified Center NAG1-1581
Author: T. R. S. Bhat
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: E. J. Richards
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Lockheed-Georgia Company
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 270
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
Author: Jay C. Hardin
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 36
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 440
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Book Description
Author:
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 176
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Book Description
Author: J. B. Ollerhead
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 116
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722189334
Category :
Languages : en
Pages : 30
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Book Description
An improved version of a previously validated linearized Euler equation solver is used to compute the noise generated by coannular supersonic jets. Results for a single supersonic jet are compared to the results from both a normal velocity profile and an inverted velocity profile supersonic jet. Hixon, R. and Shih, S.-H. and Mankbadi, Reda R. Glenn Research Center NCC3-531; RTOP 523-36-13...
