Results 261 to 270 of about 10,676 (308)

Minimax controller design for combustion instabilities

Proceedings of the 2003 American Control Conference, 2003., 2004
A robust feedback controller for combustion thermoacoustics instabilities is presented in this paper. To address the issue of the system's parameter uncertainties, the minimax principles based controller is used. The minimax corresponds to finding the best controller for the worst parameter deviation.
Nidal Al-Masoud, Tarunraj Singh
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Instability of combustion and detonation of gases

Uspekhi Fizicheskih Nauk, 1965
CONTENTS 1. Normal combustion of gases 780 2. The instability of normal combustion 781 3. Detonation 785 4. The instability of planar gas detonation with respect to the combustion front 789 5. One-dimensional instability of detonation 790 6. Pulsating detonation 792 7.
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An analytically tractable model for combustion instability

Proceedings of the 44th IEEE Conference on Decision and Control, 2006
A system of two coupled Van der Pol equations is considered as a model for combustion instability. This system is analyzed using the Krylov-Bogoliubov method. The results of the analysis are compared with simulation results and with data obtained from a combustion system.
Fethi Bouziani, Ioan Doré Landau, Alina Voda Besançon, Robert R. Bitmead   +3 more
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Adaptive control for thermoacoustic combustion instabilities

Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148), 2001
Thermoacoustic instabilities in combustion processes involve pressure and velocity limit cycling oscillations that can have adverse effects on system performance. Using a nonlinear state space model for combustion processes that captures the coupling between unsteady combustion and acoustics, a direct adaptive control framework is used to design high ...
Natasa A. Kablar, Tomohisa Hayakawa, Wassim M. Haddad 0001   +2 more
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Fingering instability in combustion: An extended view

Physical Review E, 1999
We detail the experimental situation concerning the fingering instability that occurs when a solid fuel is forced to burn against a horizontal oxidizing wind. The instability appears when the Rayleigh number for convection is below criticality. The focus is on the developed fingering state.
O, Zik, E, Moses
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An adaptive algorithm for control of combustion instability

Automatica, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Andrzej Banaszuk, Kartik B. Ariyur, Miroslav Krstic, Clas A. Jacobson   +3 more
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Model-based control of combustion instabilities

Journal of Sound and Vibration, 2005
Model-based control has been successfully implemented on an atmospheric pressure lean premixed combustion rig. The rig incorporated a pressure transducer in the combustor to provide a sensor measurement, with actuation provided by a fuel valve. Controller design was based on experimental measurement of the open loop transfer function. This was achieved
Aimee S. Morgans, Ann P. Dowling
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Instabilities in Gaseous Combustion

2015
By means of high-speed color cinematography, it was shown that the flames in lean Н2–air mixtures at an initial stage propagate symmetrically and the flame radius can be estimated from the frames of speed filming. It is shown that sufficiently strict calculation of cellular structure of the flame front of lean hydrogen mixtures requires consideration ...
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Parametric control of combustion thermo-acoustic instabilities

IEEE Transactions on Control Systems Technology, 2003
In this paper, a theoretical analysis and syntheses of a parametric controller for thermo-acoustic combustion instabilities in a liquid-fueled propulsion system is developed. A generalized wave equation describes the dynamic behavior of second order nonlinear oscillations.
Nidal Al-Masoud, Tarunraj Singh
openaire   +1 more source

Computational Modeling of Self-Excited Combustion Instabilities

Journal of Engineering for Gas Turbines and Power, 2000
It 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., Cant, R. S., Dupere, I. D J, Dowling, A. P.   +3 more
openaire   +2 more sources