A general eigenvalue theory on flow stability in turbomachinery is proposed with the emphasis on flow-instability onset. Based on this theory, a stall-inception model including the effects of complex solid geometry is developed for a multistage fan/compressors system. The capacity of the present model to predict the stall-inception point is assessed against experimental data of both a low-speed and transonic single rotor. Comparisons with a simplified two-dimensional model are performed to identify the nonnegligible effects of spanwise distribution of flowfield in a general configuration on the unstable mode of the concerned fan/compressors. It is verified that this model is capable of predicting mass flow at the stall-onset point of both subsonic and transonic flow with a reasonable accuracy, and it is sustainable in terms of computation cost for industrial application.
A General Theory of Flow-Instability Inception in Turbomachinery
AIAA Journal ; 51 , 7 ; 1675-1687
2013-04-09
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
A General Theory of Flow-Instability Inception in Turbomachinery
Online Contents | 2013
|Turbomachinery : design and theory
TIBKAT | 2003
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