Isella, G. and Seywert, C. and Culick, F. E. C. and Zukoski, E. E. (1997) A further Note on Active Control of Combustion instabilities Based on Hysteresis. Combustion Science and Technology, 126 (1-6). pp. 381-388. ISSN 0010-2202 http://resolver.caltech.edu/CaltechAUTHORS:20101118-151443293
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Hysteretic behaviour, as found in the dump combustor facility at GALCIT, allows nonlinear active control of the instability, demonstrated recently by Knoop et al. (1996). As in that work, pulses of secondary fuel, based on a simple on/off control law, have been successfully used to drive the transition between the two modes present in the hysteretic region, thereby reducing the amplitude of the pressure oscillations with minimal use of fuel. In order to clarify the origin of the phenomenon, high speed shadowgraph images of the flowfield during the transition between 'unstable' and stable burning have been taken, showing distinctive features that may help in modeling the observed behaviour. A preliminary parametric study (type of injector, duration of pulses, type of secondary flow) has also been conducted, showing that the transition can be obtained over a broad range of conditions.
|Additional Information:||© 1997 OPA (Overseas Publishers Association) Amsterdam B.V. Published in The Netherlands under license by Gordon and Breach Science Publishers. Received 21 August 1996; In final form 25 March 1997. This work was supported in part by the California Institute of Technology; partly by ENEL (Dr. Giancarlo Benelli, Program Manager); and partly by the Air Force Office of Scientific Research, AFOSR Contract No. F49620-95 -1-0272 (Dr. Mitat Birkan, Program Manager); and partly by the Department of Energy Grant DE-FC21-92MC2906.|
|Group:||Guggenheim Jet Propulsion Center|
|Subject Keywords:||Hysteresis; combustion instability|
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|Official Citation:||A further Note no Active Cpmtrol of Combustion instabilities Besed on Hyeteresis G. Isella; C. Seywert; F. E. C. Culick; E. E. Zukoski Pages 381 – 388|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||03 Dec 2010 21:53|
|Last Modified:||26 Dec 2012 12:39|
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