Adaptive Feedback Control of Combustion Instability in Annular Combustors

An adaptive feedback control strategy for axisymmetric annular combustors is developed. The controller uses the pressure perturbation at a fixed axial location downstream of the flame—provided by multiple pressure measurements around the combustor circumference—as the control input. Control is achieved via modulation of the fuel flow rate at multiple fuel valve locations. The controller is implemented in a computational low-order thermoacoustic network model of an annular combustor. Time domain simulations show that the controller stabilizes both longitudinal and circumferential unstable modes (including the simultaneous control of multiple unstable modes), even from within the limit cycle. By changing the flame transfer function with time, it is shown that control is retained following a large change in the combustor operating conditions.

[1]  C. A. Armitage,et al.  Flame Transfer Function for Swirled LPP Combustion From Experiments and CFD , 2004 .

[2]  Ann P. Dowling,et al.  A Time-Domain Network Model for Nonlinear Thermoacoustic Oscillations , 2009 .

[3]  Anuradha M. Annaswamy,et al.  A Model-based Self-tuning Controller forThermoacoustic Instability , 1998 .

[4]  A. J. Moran,et al.  Active Control of Combustion and its Applicatons , 2001 .

[5]  Christian Oliver Paschereit,et al.  On the Use of Helmholtz Resonators for Damping Acoustic Pulsations in Industrial Gas Turbines , 2001 .

[6]  Jeffrey M. Cohen,et al.  Active Control of Combustion Instability in a Liquid–Fueled Low–NOx Combustor , 1998 .

[7]  Aimee S. Morgans,et al.  Model-Based Control of Combustion Instabilities in Annular Combustors , 2006 .

[8]  Ann P. Dowling,et al.  Low-Order Modelling of Thermoacoustic Limit Cycles , 2004 .

[9]  Bruno Schuermans,et al.  Thermoacoustic modeling of a gas turbine combustor equipped with acoustic dampers , 2005 .

[10]  Yedidia Neumeier,et al.  Experimental demonstration of active control of combustion instabilities using real-time modes observation and secondary fuel injection , 1996 .

[11]  Hadi Widjaya. Tjioe.  Feedback control of combustion oscillations , 2010 .

[12]  Ann P. Dowling,et al.  Acoustic Analysis of Gas Turbine Combustors , 2003 .

[13]  Douglas L. Straub,et al.  Passive Control of Combustion Dynamics in Stationary Gas Turbines , 2003 .

[14]  Anuradha M. Annaswamy,et al.  Self-tuning regulators for combustion oscillations , 2003, Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[15]  Wolfgang Polifke,et al.  Low-Order Acoustic Modelling for Annular Combustors: Validation and Inclusion of Modal Coupling , 2002 .

[16]  Anuradha M. Annaswamy,et al.  Advanced Closed-Loop Control on an Atmospheric Gaseous Lean-Premixed Combustor , 2004 .

[17]  Clifford Johnson,et al.  Demonstration of Active Control of Combustion Instabilities on a Full-Scale Gas Turbine Combustor , 2001 .

[18]  Ann P. Dowling,et al.  Three Dimensional Thermoacoustic Oscillation in a Premix Combustor , 2001 .

[19]  Michael C. Janus,et al.  Characterization of Oscillations During Premix Gas Turbine Combustion , 1997 .

[20]  Anuradha M. Annaswamy,et al.  Adaptive Control of Combustion Instabilities for Combustion Systems with Right-Half Plane Zeros , 2008 .

[21]  Anuradha M. Annaswamy,et al.  Adaptive Control of a Class of Time-Delay Systems , 2003 .

[22]  B. Chu.  On the energy transfer to small disturbances in fluid flow (Part I) , 1965 .

[23]  Bruno Schuermans,et al.  Modeling and control of thermoacoustic instabilities , 2003 .

[24]  D. Yanakiev,et al.  Adaptive Idle Speed Control for Internal Combustion Engines , 2007, 2007 American Control Conference.

[25]  L. W.,et al.  The Theory of Sound , 1898, Nature.

[26]  G. Schneider,et al.  Tuning of a combustion controller by extremum seeking: a simulation study , 2000, Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187).

[27]  Anuradha M. Annaswamy,et al.  Active Control Technology for Enhanced Performance Operational Capabilities of Military Aircraft, Land Vehicles and Sea Vehicles , 2001 .

[28]  O. J. M. Smith,et al.  A controller to overcome dead time , 1959 .

[29]  A. Dowling.  Nonlinear self-excited oscillations of a ducted flame , 1997, Journal of Fluid Mechanics.

[30]  T. Lieuwen,et al.  The role of equivalence ratio oscillations in driving combustion instabilities in low NOx gas turbines , 1998 .

[31]  A. Dowling,et al.  Thermoacoustic Oscillations in an Annular Combustor , 2001 .

[32]  Fred E. C. Culick,et al.  Combustion instabilities in liquid-fuelled propulsion systems , 1988 .