Kabiraj, Lipika ; Sujith, R. I. (2011) Investigation of subcritical instability in ducted premixed flames In: ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, June 6–10, 2011, Vancouver, British Columbia, Canada.
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Official URL: http://proceedings.asmedigitalcollection.asme.org/...
Related URL: http://dx.doi.org/10.1115/GT2011-46155
Abstract
An experimental investigation of the bistable region of instability in a thermoacoustic system comprising of ducted, pre-mixed laminar flames has been performed. The stability diagram of the system is obtained and the bistable region for a range of flame locations at different fuel-air mixture equivalence ratios is identified. Subsequently, threshold amplitudes for triggering instability in the system using sinusoidal acoustic forcing, introduced externally, is obtained. It is observed that depending on how close the system is to the Hopf point and the nature of oscillations at the Hopf point, the triggered oscillations can exhibit different dynamical behavior.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Source: | Copyright of this article belongs to The American Society of Mechanical Engineers. |
| ID Code: | 110325 |
| Deposited On: | 21 Dec 2017 10:57 |
| Last Modified: | 21 Dec 2017 10:57 |
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