Results 1 to 10 of about 633,794 (335)
Flame transfer function analysis of hydrogen diffusion swirl flames
Proceedings of the Combustion InstituteProceedings of the Combustion Institute, 40 (1-4)
Guoqing Wang +3 more
semanticscholar +4 more sources
Flame transfer function measurements of hydrogen-enriched reheat flames
Combustion and FlameThis study experimentally investigates the dynamic behavior of hydrogen-natural gas reheat flames, which are stabilized by both flame propagation and autoignition. Measurements are conducted on an test rig which allows the acoustic excitation of reheat flames.
Florian Franke +2 more
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Influence of flame-holder temperature on the acoustic flame transfer functions of a laminar flame [PDF]
Combustion and Flame, 2018 The occurrence of combustion instabilities in high-performance engines such as gas turbines is often affected by the thermal state of the engine. For example, strong bursts of pressure fluctuations may occur at cold start for operating conditions that are stable once the engine reaches thermal equilibrium.
Daniel Mejia +6 more
openaire +5 more sources
Analytical modelling of flame transfer functions for technically premixed flames
International Journal of Spray and Combustion Dynamics, 2022 The linear response to harmonic acoustic excitation of the total heat release rate in technically premixed flames (Flame Transfer Function, FTF) is studied in case of an ideal swirl burner. The analysis is based on the linearization of the production rate for the mean reaction progress variable modelled with a turbulent flame speed closure.
Fernando Biagioli +3 more
openaire +2 more sources
Linear instability of a premixed slot flame: Flame transfer function and resolvent analysis
Combustion and Flame, 2022 International audience ; The response to forcing of a 2D laminar premixed slot flame is investigated by means of linear analysis, based on the compressible flow equations with a two-step reaction scheme for methane combustion. The flame transfer function (FTF) is computed from this linear model, in excellent agreement with reference nonlinear ...
Chuhan Wang +5 more
openaire +2 more sources
Robust combustor design based on flame transfer function modification
International Journal of Spray and Combustion Dynamics, 2022 Operation under stable conditions is an important prerequisite for gas turbine safety. While recent studies have focused primarily on acoustic design to avoid thermoacoustic instabilities, in the present study we shift the focus to improving stability margins by flame transfer function (FTF) modification.
Jakob G. R. von Saldern +4 more
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Energies, 2023 Thermoacoustic instabilities in gasturbine combustor systems can be predicted in the design phase with a thermoacoustic network model. In this model, the coupling between acoustic pressure fluctuations and the combustion rate is described by the Flame ...
Mehmet Kapucu, Jim B. W. Kok
doaj +2 more sources
A Flame Transfer Function with Nonlinear Phase
Journal of the Korean Society of Propulsion Engineers, 2016 In this paper we propose a new frame transfer function model describing the variations of a heat release rate in response to an external flow oscillation in gas turbine systems. A critical difference of our model compared to the so-called model which
Myung-Gon Yoon, Jina Kim, Deasik Kim
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Time Lag Analysis Using Phase of Flame Transfer Function
Journal of ILASS-Korea, 2016 Main purpose of the current paper is to show results of time lag analysis using phase information of flame transfer function in order to predict combustion instabilities in a gas turbine combustor.
Yeongmin Pyo, Jihwan Kim, Daesik Kim
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On the flame transfer function models for laminar premixed conical and V- flames considering the stretch effect [PDF]
Combustion and Flame, 2023 This paper investigates a predictive model that considers the impact of stretch on the dynamic response of laminar premixed conical and V- flames; the flame stretch consists of two components: the flame curvature and flow strain. The steady and perturbed
Yu Tian +3 more
semanticscholar +1 more source