2016
DOI: 10.2514/1.b35953
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Coaxial Jet Flame Subject to Long-Wavelength Acoustic Oscillations

Abstract: A linear model is developed to relate the response of energy release rate per unit volume to velocity and pressure oscillations in a liquid-propellant rocket engine. Coaxial injection of fuel (outer flow) and oxygen (inner flow) is considered with chemical reaction in a thin flame and turbulent mixing as the controlling factor in an axisymmetric diffusion flame. The combustion process has a characteristic time for mixing, producing a time lag in the energy release rate relative to pressure. The model applies t… Show more

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Cited by 7 publications
(6 citation statements)
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“…Calculations have been made to analyze the solutions for the amplitude and phase as functions of time using the perturbation theory. The results are obtained using the oscillating coaxial jet turbulent diffusion flame model developed by Sirignano and Krieg [27]. Results are presented here considering methane and gaseous-oxygen propellants with a fuel-to-oxygen mass stoichiometric coefficient of 1∕4.…”
Section: Resultsmentioning
confidence: 99%
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“…Calculations have been made to analyze the solutions for the amplitude and phase as functions of time using the perturbation theory. The results are obtained using the oscillating coaxial jet turbulent diffusion flame model developed by Sirignano and Krieg [27]. Results are presented here considering methane and gaseous-oxygen propellants with a fuel-to-oxygen mass stoichiometric coefficient of 1∕4.…”
Section: Resultsmentioning
confidence: 99%
“…2 show that the in-phase component of the combustion response factor decreases as R o increases. Basically, this the Strouhal number effect [27]. Namely, the mixing time increases as Fig.…”
Section: A Combustion Response Factormentioning
confidence: 90%
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