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The generation of noise by the fluctuations in gas temperature into a turbine

Cumpsty, Nicholas A. and Marble, F. E. (1974) The generation of noise by the fluctuations in gas temperature into a turbine. Report CUED/A TURBO/TR, 57. , Cambridge, England. http://resolver.caltech.edu/CaltechAUTHORS:20110126-092110939

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Abstract

An actuator disc analysis is used to calculate the pressure fluctuations produced by the convection of temperature fluctuations (entropy waves) into one or more rows of blades. The perturbations in pressure and temperature must be small, but the mean flow deflection and acceleration are generally large. The calculations indicate that the small temperature fluctuations produced by combustion chambers are sufficient to produce large amounts of acoustic power. Although designed primarily to calculate the effect of entropy waves, the method is more general and is able to predict the pressure and vorticity waves generated by upstream or downstream going pressure waves or by vorticity waves impinging on blade rows.


Item Type:Report or Paper (Technical Report)
Additional Information:© 1974, The authors wish to thank Dr. D.S. Whitehead for his help in discussing some aspects of this work, and in particular for his assistance with the method of solution. The help of Drs. R.R. Dils and E.M. Greitzer of Pratt and Whitney aircraft is greatly appreciated.
Group:Guggenheim Jet Propulsion Center
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Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion Center UNSPECIFIED
Record Number:CaltechAUTHORS:20110126-092110939
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110126-092110939
Official Citation:N. A. CUMPSTY and F. E. MARBLE 1974 Cambridge University Engineering Department, Report CUEDIA Turbo/TR57. The generation of noise by the fluctuations in gas temperature into a turbine
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21895
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:09 Feb 2011 22:13
Last Modified:26 Dec 2012 12:52

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