Combustion Instability Active Control Using Periodic Fuel Injection

Hathout, J. P.; Fleifil, M.; Annaswamy, Anuradha M.; Ghoniem, Ahmed F.

doi:10.2514/2.5947

Cited by 68 publications

(22 citation statements)

References 18 publications

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“…It is found that when the control is switched on, chaotic nonlinear behaviour transitions onto specific periodic motions as a result, amplitudes damp considerably. In addition, this control methodology using instantaneous pulses prescribed via the algorithm just described may be regarded as providing the fundamental rational basis to influence combustion instability as exercised in current practice [33,16].…”

Section: Controlling Chaos For the Bi-parameter Modelmentioning

confidence: 99%

Chaotic modelling and control of combustion instabilities due to vaporization

Lei

Turan

2010

International Journal of Heat and Mass Transfer

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Section: Controlling Chaos For the Bi-parameter Modelmentioning

confidence: 99%

Chaotic modelling and control of combustion instabilities due to vaporization

Lei

Turan

2010

International Journal of Heat and Mass Transfer

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“…The driving term for the combustion chamber would be related to the heat release rate fluctuation, which takes the form of ( − 1)/ ⋅̇′/ . 11,23 Hence the plenum and combustion chamber pressure fluctuations would be governed by:…”

Section: A Model Descriptionmentioning

confidence: 99%

“…Similar analysis have also been carried out previously on several different setups. 11,14 Firstly, the GMTC is simplified and takes the form of an abstract system consisting of four connected bodies, as shown in figure 8. Here the four major elements of the system correspond to (0) plenum, (1) injector/swirler, (2) combustion chamber, and (3) chimney.…”

Section: A Model Descriptionmentioning

confidence: 99%

Experimental Studies and Modeling of Acoustic Instabilities in a Gas Turbine Model Combustor

Chen

Driscoll

2015

53rd AIAA Aerospace Sciences Meeting

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Partially premixed combustion has the merits of lower NO x emission as well as higher efficiency. However practical applications of such technology have been hindered by acoustic instabilities generated in combustion chambers when gas turbine engines are operated in premixed mode. A thorough understanding of the physical processes which trigger and sustain this instability needs to be gained to aid the design of next generation low-emission high-efficiency gas turbine engines. In this work, acoustic instabilities manifested in the Gas Turbine Model Combustor (GTMC), which was developed at DLR Stuttgart by W. Meier and colleagues, were investigated. Specifically, the GTMC was operated with dimethyl ether (DME) in a fuel rich condition. Multi-point pressure measurements were carried out to characterize the dominant instability mode of the combustion chamber. Simultaneous Planar Laser-Induced Fluorescence (PLIF) of formaldehyde (CH 2 O) and pressure measurements were then made at a sustained frequency of 4 kHz. Flame surface densities, calculated from the flame edges detected in the PLIF images, were used as the indicator of flame heat release rate and determined both temporally and spatially. Finally a reduced order model was proposed to describe the observed combustion instability. Key predictions made by this model, such as instability frequency and pressure phase differences, agreed with experimental observations. Future work will focus on expanding present model to explore the effects of varying parameters on the combustion instability.

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“…There have been many passive or active control methods, such as Helmholtz resonator [50][51], perforated liner [52], jet injection [53], fuel injection [54] and acoustic feedback [3]. However, these methods are still not adequate enough to be applied into systems like jet engines because of either inefficiency or the lack of suitable actuators for operation in such harsh working environments.…”

Section: Used Finite Elementmentioning

confidence: 99%

Bifurcation and nonlinear analysis of a time-delayed thermoacoustic system

Yang

Turan

Lei³

2017

Communications in Nonlinear Science and Numerical Simulation

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In this paper, of primary concern is a time-delayed thermoacoustic system, viz. a horizontal Rijke tube. A continuation approach is employed to capture the nonlinear behavior inherent to the system. Unlike the conventional approach by the Galerkin method, a dynamic system is naturally built up by discretizing the acoustic momentum and energy equations incorporating appropriate boundary conditions using a finite difference method. In addition, the interaction of Rijke tube velocity with oscillatory heat release is modeled using a modified form of King's law. A comparison of the numerical results with experimental data and the calculations reported reveals that the current approach can yield very good predictions. Moreover, subcritical Hopf bifurcations and fold bifurcations are captured with the evolution of dimensionless heat release coefficient, generic damping coefficient and time delay.Linear stability boundary, nonlinear stability boundary, bistable region and limit cycles are thus determined to gain an understanding of the intrinsic nonlinear behaviors.

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Combustion Instability Active Control Using Periodic Fuel Injection

Cited by 68 publications

References 18 publications

Chaotic modelling and control of combustion instabilities due to vaporization

Chaotic modelling and control of combustion instabilities due to vaporization

Experimental Studies and Modeling of Acoustic Instabilities in a Gas Turbine Model Combustor

Bifurcation and nonlinear analysis of a time-delayed thermoacoustic system

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