Response of a laminar premixed flame to flow oscillations: A kinematic model and thermoacoustic instability results

Fleifil, M.

doi:10.1016/0010-2180(96)00049-1

Cited by 460 publications

(224 citation statements)

References 8 publications

Supporting

Mentioning

221

Contrasting

Unclassified

Order By: Relevance

“…In this approach, the kinematic evolution of the flame front is related to fluctuations of the flame surface -3 -area and flame heat release. Fleifil et al [25] solved the linearised G equation for a laminar flame stabilised in a simple duct flow and developed a theoretical flame transfer function. Later, Ducruix et al [22] …”

Section: Introductionmentioning

confidence: 99%

Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Karimi

2014

Energy

View full text Add to dashboard Cite

This paper presents an experimental study on the dynamics of a ducted, conical, laminar premixed flame subjected to low amplitude acoustic excitation from upstream. The heat release response of the flame to velocity disturbances is investigated through measurement of the so called 'flame transfer function' for a wide range of forcing frequencies. The results are compared with those predicted by the existing linear kinematic theories. It is observed that these theories are in general agreement with the experiment, although there exist some disparities. A detailed comparison of the experimental data with the kinematic theories shows that the phase speed of flame disturbances has an essential influence upon the level of agreement between the theory and experiment. The data set presented in this work complements that reported in an earlier study. In keeping with others, visualisation of the excited flames clearly shows that the flame response includes waves on the flame front which are formed at the base and then convect along the flame.

show abstract

Section: Introductionmentioning

confidence: 99%

Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Karimi

2014

Energy

View full text Add to dashboard Cite

show abstract

“…A short overview shall be given here. Lean CH 4 -flames subject to time-dependent perturbations of the strain rate are investigated in [2], focussing on the time delay between perturbation and flame response as well as the amplitude of the flame response due to different perturbation frequencies. Oscillating strain rates are also investigated in [3] by using large activation energy asymptotics to analyse the response behaviour of a counterflow diffusion flame.…”

mentioning

confidence: 99%

“…Oscillating strain rates are also investigated in [3] by using large activation energy asymptotics to analyse the response behaviour of a counterflow diffusion flame. Fleifil et al [4] describes the response of a laminar premixed flame stabilized on the rim of a tube subjected to flow oscillations and develops a model which captures the flame surface kinematics. In [1], the behaviour of the heat release of laminar premixed flames during the influence of equivalence ratio oscillations is investigated, finding that the disturbance of flame area and flame speed as well as the heat of reaction control the response of the heat release to the perturbation.…”

mentioning

confidence: 99%

Investigation of the Dynamical Response of Methane/Air Counterflow Flames to Inflow Mixture Composition and Flow Field Perturbations

König

Bykov

Maas

2008

Flow Turbulence Combust

View full text Add to dashboard Cite

This work presents an analysis of the response of laminar, stretched, premixed CH 4 -air counterflow flames subject to periodical perturbations of the inflow mixture composition and the flow field in the context of ILDM and REDIM. Investigations of the perturbation propagation show, that the perturbation reaches the flame under certain conditions only; changes of the perturbation due to dissipative processes are investigated. Different methods are applied to gain an in-depth view of the influence of the perturbation on the chemical kinetics, namely correlation analyses of species in state space and timescale and element composition analyses. For the timescale analyses, two methods are applied, the ILDM method and a new concept for timescale analysis within the REDIM method. It is shown, that the perturbation does not change the global behaviour of the chemical kinetics and it is suggested to apply REDIMs for a low-dimensional description of perturbed flames.

show abstract

“…Fleifil et al [25] used a kinematic model to calculate the transfer function in the linear regime between heat release and upstream velocity oscillation of a premixed flame stabilized on the rim of a tube. The kinematic approach was later extended by Schuller et al [26] by including convective effects of the flow modulations propagating upstream of the flame.…”

Section: The Attached Flame Methods (Afm)mentioning

confidence: 99%

“…In this paper we present a new phenomenological model for the unsteady heat release from an attached flame. The model, denoted the attached flame method (AFM), is similar to the analytical flame front model [25,26] in the sense that a real-time differential equation is solved to capture the kinematics of the thermoacoustic instabilities. However, while the kinematic model is based on the G-equation approach to determine the location of the flame front, in AFM the flame position is obtained directly from the equations for the species mass fractions.…”

Section: The Attached Flame Methods (Afm)mentioning

confidence: 99%

Nonlinear simulations of combustion instabilities with a quasi-1D Navier–Stokes code

Haugen

Langørgen

Sannan

2011

Journal of Sound and Vibration

View full text Add to dashboard Cite

As lean premixed combustion systems are more susceptible to combustion instabilities than non-premixed systems, there is an increasing demand for improved numerical design tools that can predict the occurrence of combustion instabilities with high accuracy. The inherent non-linearities in combustion instabilities can be of crucial importance, and we here propose an approach in which the one-dimensional Navier-Stokes and scalar transport equations are solved for geometries of variable cross-section. The focus is on attached flames, and for this purpose a new phenomenological model for the unsteady heat release from a flame front is introduced. In the attached flame method (AFM) the heat release occurs over the full length of the flame. The non-linear code with the use of the AFM approach is validated against results from an experimental study of thermoacoustic instabilities in oxy-fuel flames by Ditaranto and Hals [Combustion and Flame, 146, 493-512 (2006)]. The numerical simulations are in accordance with the experimental measurements and both the frequencies and the amplitudes of the resonant acoustic pressure modes are reproduced with good accuracy.

show abstract

Response of a laminar premixed flame to flow oscillations: A kinematic model and thermoacoustic instability results

Cited by 460 publications

References 8 publications

Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Investigation of the Dynamical Response of Methane/Air Counterflow Flames to Inflow Mixture Composition and Flow Field Perturbations

Nonlinear simulations of combustion instabilities with a quasi-1D Navier–Stokes code

Contact Info

Product

Resources

About