Modeling and analysis of premixed flame dynamics by means of distributed time delays
W Polifke - Progress in Energy and Combustion Science, 2020 - Elsevier
The unsteady response of a flame to acoustic or flow perturbations plays a crucial role in
thermoacoustic combustion instability. The majority of studies on this subject presents and …
thermoacoustic combustion instability. The majority of studies on this subject presents and …
Prediction and control of combustion instabilities in real engines
T Poinsot - Proceedings of the Combustion Institute, 2017 - Elsevier
This paper presents recent progress in the field of thermoacoustic combustion instabilities in
propulsion engines such as rockets or gas turbines. Combustion instabilities have been …
propulsion engines such as rockets or gas turbines. Combustion instabilities have been …
Forced response of laminar non-premixed jet flames
N Magina, V Acharya, T Lieuwen - Progress in Energy and Combustion …, 2019 - Elsevier
This paper reviews current understanding of the manner in which non-premixed jet flames
respond to flow disturbances, and compares these characteristics to premixed flames …
respond to flow disturbances, and compares these characteristics to premixed flames …
Intrinsic instability of flame–acoustic coupling
M Hoeijmakers, V Kornilov, IL Arteaga, P de Goey… - Combustion and …, 2014 - Elsevier
This paper shows that a flame can be an intrinsically unstable acoustic element. The finding
is clarified in the framework of an acoustic network model, where the flame is described by …
is clarified in the framework of an acoustic network model, where the flame is described by …
Modeling of premixed swirling flames transfer functions
An analytical model is derived for the linear response of swirling flames submitted to velocity
disturbances. The flame dynamics is represented by a linearized version of the G-equation …
disturbances. The flame dynamics is represented by a linearized version of the G-equation …
Mixed acoustic–entropy combustion instabilities in gas turbines
A combustion instability in a combustor terminated by a nozzle is analysed and modelled
based on a low-order Helmholtz solver. A large eddy simulation (LES) of the corresponding …
based on a low-order Helmholtz solver. A large eddy simulation (LES) of the corresponding …
Numerical study on intrinsic thermoacoustic instability of a laminar premixed flame
A study on the velocity sensitivity and intrinsic thermoacoustic stability of a laminar,
premixed, Bunsen-type flame is carried out. Direct numerical simulation (DNS) of the flame …
premixed, Bunsen-type flame is carried out. Direct numerical simulation (DNS) of the flame …
Sensitivity analysis of transfer functions of laminar flames
The sensitivity of laminar premixed methane/air flames responses to acoustic forcing is
investigated using direct numerical simulation to determine which parameters control their …
investigated using direct numerical simulation to determine which parameters control their …
Inclusion of higher harmonics in the flame describing function for predicting limit cycles of self-excited combustion instabilities
M Haeringer, M Merk, W Polifke - Proceedings of the Combustion Institute, 2019 - Elsevier
Abstract The Flame Describing Function (FDF) is widely used to model non-linear thermo-
acoustic phenomena, eg limit cycle oscillations in a combustor. The FDF is a weakly non …
acoustic phenomena, eg limit cycle oscillations in a combustor. The FDF is a weakly non …
Nonlinear thermoacoustics of ducted premixed flames: the influence of perturbation convection speed
When a premixed flame is placed within a duct, acoustic waves induce velocity perturbations
at the flame's base. These travel down the flame, distorting its surface and modulating its …
at the flame's base. These travel down the flame, distorting its surface and modulating its …