View source for Active Control of an Axial Flow Compressor via Pulsed Air Injection

{{HTDB paper
| authors = Raffaello D'Andrea, Robert L. Behnken, Richard M. Murray 
| title = Active Control of an Axial Flow Compressor via Pulsed Air Injection 
| source = <i>J. Turbomachinery</i>, 119(4):742-752
| year = 1997
| type = CDS
Technical Report
| funding = 
| url = http://www.cds.caltech.edu/~murray/preprints/cds95-029.pdf
| abstract =  This paper presents the use of pulsed air injection to control the onset of rotating
stall in a low-speed, axial flow compressor. By measuring the unsteady pressures near the
rotor face, a control algorithm determines the magnitude and phase of the first mode of
rotating stall and controls the injection of air in the front of the rotor face.
Experimental results show that this technique slightly extends the stall point of the
compressor and eliminates the hysteresis loop normally associated with rotating stall. A
parametric study is used to determine the optimal control parameters for suppression of
stall. Analytic results---using a low-dimensional model developed by Moore and Greitzer
combined with an unsteady shift in the compressor characteristic to model the
injectors---give further insights into the operation of the controller. Based on this
model, we show that the behavior of the experiment can be explained as a change in the
bifurcation behavior of the system under nonlinear feedback. A higher fidelity simulation
model is then used to further verify some of the specific performance characteristics that
are observed in experiments. 
| flags = 
| tag = dbm95-cds
| id = 1995p
}}