Improved Correlations for Augmentor Static Stability (Postprint)

Flame stability is critical to the operational performance of combustion systems in propulsion and power generation. Current predictive tools for flame stability are based on decades-old empirical correlations that have limited applicability for modern combustor designs. Recent advances in computati...

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Bibliographic Details
Main Authors: Kiel, Barry V, Knaus, Darin A, Magari, Patrick J, Hill, Roger W, Phillips, Scott D
Format: Report
Language:English
Subjects:
AUGMENTATION
COMBUSTION
Combustion and Ignition
COMBUSTORS
COMPUTATIONAL FLUID DYNAMICS
DIAGNOSIS(GENERAL)
ELECTRIC POWER PRODUCTION
FLAMES
Fluid Mechanics
METHODOLOGY
PE62203F
PREDICTIONS
STABILITY
STATIC STABILITY
WUAFRL306605YY
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Summary:Flame stability is critical to the operational performance of combustion systems in propulsion and power generation. Current predictive tools for flame stability are based on decades-old empirical correlations that have limited applicability for modern combustor designs. Recent advances in computational fluid dynamics (CFD) and advanced combustion diagnostics have provided new insight into the fundamental processes that occur in these flows. Reacting-flow CFD has yet to mature to a level where it can be practically applied as a design tool for this problem. This paper describes a new methodology for analyzing flame stability intended to provide designers with a significantly improved near-term predictive capability. Our predictive methodology is based on a Damk?hler number (Da) approach. Simplified CFD calculations are used to calculate relevant flow timescales, and reactor model calculations are used to characterize the important chemical timescales in the system. These timescales are used to form a Da number that is used to determine stability. Prepared in collaboration with Creare Inc., Hanover, NH.