The generation of noise by the fluctuations in gas temperature into a turbine
- Creators
- Cumpsty, Nicholas A.
- Marble, F. E.
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.
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.Attached Files
Accepted Version - 259_Cumpsty_NA_1974.pdf
Files
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Additional details
- Eprint ID
- 21895
- Resolver ID
- CaltechAUTHORS:20110126-092110939
- Created
-
2011-02-09Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Guggenheim Jet Propulsion Center
- Series Name
- Report CUED/A TURBO/TR
- Series Volume or Issue Number
- 57
- Other Numbering System Name
- Guggenheim Jet Propulsion Center