Computation of Transfer Matrices for Gas Turbine Combustors Including Acoustics/Flame Interaction

Pankiewitz, Christian; Fischer, Andreas; Hirsch, Christoph; Sattelmayer, Thomas

doi:10.2514/6.2003-3295

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Measurement Of Flame Transfer Function1

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Cited by 6 publications

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“…Flame transfer functions are usually measured for the whole combustor 39,51,52 or by zones. 53 In the present approach, n and φ must be obtained locally at each point of the combustor, and this can be done by analyzing snapshot series from LES.…”

Section: Measurement Of Flame Transfer Functionmentioning

confidence: 99%

Large-Eddy Simulation and Acoustic Analysis of a Swirled Staged Turbulent Combustor

et al. 2006

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Section: Measurement Of Flame Transfer Functionmentioning

confidence: 99%

Large-Eddy Simulation and Acoustic Analysis of a Swirled Staged Turbulent Combustor

et al. 2006

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Simulations of the scattering of sound waves at a sudden area expansion

Kierkegaard

Boij

Efraimsson

2012

Journal of Sound and Vibration

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Nonlinear Heat-Release/Acoustic Interactions in a Gas Turbine Combustor

Bellows

Lieuwen

2004

Volume 1: Turbo Expo 2004

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This paper describes an experimental investigation of the response of the flame in a lean, premixed combustor to imposed acoustic oscillations. The ultimate objective of this work is to develop capabilities for predicting the amplitude of combustion instabilities in gas turbines. Simultaneous measurements of CH* and OH* chemiluminescence, pressure, and velocity were obtained over a range of forcing amplitudes and frequencies. These data show that nonlinearity in the heat release/acoustic transfer function is manifested in two ways. First, the flame chemiluminescence response to imposed oscillations saturates at pressure and velocity amplitudes on the order of p’/po ∼0.02 and u’/uo∼0.3. In addition, the phase between the CH* or OH* oscillations and acoustic oscillations exhibits some amplitude dependence, even at disturbance amplitudes where the amplitude transfer function is linear. We also find that the response of this swirling, highly turbulent flame exhibits similarities to those of simple, laminar flame configurations. First, the “linear”, low amplitude flame response is similar to the laminar, V-flame measurements and predictions of Schuller et al. [1]. Also, at large disturbance amplitudes, the subharmonic characteristics of the oscillations exhibit analogous characteristics to those observed by Bourehla & Baillot [2] in a conical Bunsen flame, and Searby & Rochwerger [3] in a flat flame.

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Computation of Transfer Matrices for Gas Turbine Combustors Including Acoustics/Flame Interaction

Cited by 6 publications

References 11 publications

Large-Eddy Simulation and Acoustic Analysis of a Swirled Staged Turbulent Combustor

Large-Eddy Simulation and Acoustic Analysis of a Swirled Staged Turbulent Combustor

Simulations of the scattering of sound waves at a sudden area expansion

Nonlinear Heat-Release/Acoustic Interactions in a Gas Turbine Combustor

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