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1968
Temporal variations in a combustion system are always present and take varieties of forms and intensity under different environments. A system is stable if a disturbance introduced into the system decreases in amplitude with time and eventually becomes lost in the random fluctuations prevailing in the system.
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Temporal variations in a combustion system are always present and take varieties of forms and intensity under different environments. A system is stable if a disturbance introduced into the system decreases in amplitude with time and eventually becomes lost in the random fluctuations prevailing in the system.
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Computational Modeling of Self-Excited Combustion Instabilities
Journal of Engineering for Gas Turbines and Power, 2000It is well known that lean premixed combustion systems potentially offer better emissions performance than conventional non-premixed designs. However, premixed combustion systems are more susceptible to combustion instabilities than non-premixed systems. Combustion instabilities (large-scale oscillations in heat release and pressure) have a deleterious
Brookes, S. J. +3 more
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NONLINEAR/CHAOTIC MODELING AND CONTROL OF COMBUSTION INSTABILITIES
International Journal of Bifurcation and Chaos, 2010A discrete dynamic model accounting for both combustion and vaporization processes is proposed. In terms of different bifurcation parameters relevant to either combustion or evaporation, various bifurcation diagrams are presented. Furthermore, the corresponding Lyapunov exponent is calculated and employed to analyze the stability of the particular ...
Shenghui Lei, Ali Turan
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Combustion instability studies with plastic propellent
5th Propulsion Joint Specialist, 1969The eifect of compositional changes on the stability of combustion of plastic propellent, based upon ammonium perchlorate and polyisobutene, is investigated using a 2-in.-diam T burner for the frequencies 0.7-4.0 kHz at 1000 psig. Oxidizer particle size can have a pronounced effect both on the acoustic response and on the maximum pressure amplitude ...
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Surrogates for Combustion Instabilities in Annular Combustors
2018While the computational power is still increasing, thus arousing theinterest for high-fidelity simulations, the need of low-order models is also feltto both predict and understand combustion instabilities at low costs. Historicallyapplied to simple systems like longitudinal Rijke tubes to unveil the driven mechanismsleading to instability, they have ...
Bauerheim, Michael +2 more
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Combustion instability: a distributed-parameter model
Proceedings of the 2003 American Control Conference, 2003., 2004Two distributed parameter models are suggested as models for thermo-acoustic combustion instability. A standing-wave model exhibits the expected qualitative behavior and is of interest for future stabilization studies.
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