A further Note no Active Cpmtrol of Combustion instabilities Besed on Hyeteresis

Autor:	Fred E. C. Culick, E. E. Zukoski, C. Seywert, G. Isella
Rok vydání:	1997
Předmět:	Chemistry General Chemical Engineering General Physics and Astronomy Energy Engineering and Power Technology General Chemistry Injector Mechanics Secondary flow Instability law.invention Nonlinear system Hysteresis Fuel Technology Amplitude law Combustor Shadowgraph
Zdroj:	Combustion Science and Technology. 126:381-388
ISSN:	1563-521X 0010-2202
DOI:	10.1080/00102209708935682
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e4c9a313a4ad469fc00252a85f202549 https://doi.org/10.1080/00102209708935682 Zobrazit plný text záznamu