Houghton, T and Day, I (2009) Enhancing the stability of subsonic compressors using casing grooves. Proceedings of the ASME Turbo Expo, 7. pp. 39-48.Full text not available from this repository.
Casing grooves are known to increase the stable operating range of axial compressors. The mechanism by which this stability enhancement occurs is poorly understood. This paper develops a better understanding of the behaviour of grooves through analysis of new data. An experimental parametric study is used to demonstrate the effect of varying the axial location of a single casing groove on the stability and efficiency of the compressor. The effect that the groove has on rotor outflow blockage, blade loading and the near-casing flow field is then studied using both experimental and computational methods. It is found that the interaction of the groove with the flow field is different when the groove is positioned forward or aft relative to the blade. The interaction of the groove with the flow in the tip region in both of these positions is presented in detail. Finally, the implications of these findings for the design of casing grooves of different depths are discussed. Copyright © 2009 Rolls-Royce plc.
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|Date Deposited:||16 Jul 2015 14:09|
|Last Modified:||04 Aug 2015 22:30|