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Experimental Evaluation of Air Injection for Actuation of Rotating Stall in a Low Speed, Axial Fan
Abstract This paper presents an experimental invest …
This paper presents an experimental investigation of the effects of air injection on the rotating stall instability in a low speed axial compressor. Two experiments concerning air injection were tried. The first experiment used a continuous forcing perpendicular to the flow in the same or opposite direction of the tip velocity. The results show a dramatic difference between the two directions, with opposite direction forcing causing a significant increase in performance, and same direction forcing causing a significant decrease in performance. This result contradicts the Emmons stall propagation model. The second experiment investigated the differences with respect to different frequencies of air injection, with the injector pointed at the fan, parallel to the flow. We found that the change in the compressor characteristic in the unstalled region was highly dependent upon the forcing frequency with the maximum change occurring near the frequency of stall.
nge occurring near the frequency of stall.  +
Authors Asif Khalak and Richard M. Murray  +
Flags NoRequest  +
ID 1994l  +
Source ASME Turbo Expo '95  +
Tag km95-turbo  +
Title Experimental Evaluation of Air Injection for Actuation of Rotating Stall in a Low Speed, Axial Fan +
Type Conference paper  +
Categories Papers
Modification date
This property is a special property in this wiki.
15 May 2016 06:20:43  +
URL
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http://www.cds.caltech.edu/~murray/preprints/km95-turbo.pdf  +
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Experimental Evaluation of Air Injection for Actuation of Rotating Stall in a Low Speed, Axial Fan + Title
 

 

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