Sensitivity and nonlinearity of thermoacoustic oscillations
MP Juniper, RI Sujith - Annual Review of Fluid Mechanics, 2018 - annualreviews.org
Nine decades of rocket engine and gas turbine development have shown that
thermoacoustic oscillations are difficult to predict but can usually be eliminated with …
thermoacoustic oscillations are difficult to predict but can usually be eliminated with …
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 …
[HTML][HTML] Prediction of combustion instability limit cycle oscillations by combining flame describing function simulations with a thermoacoustic network model
Accurate prediction of limit cycle oscillations resulting from combustion instability has been a
long-standing challenge. The present work uses a coupled approach to predict the limit …
long-standing challenge. The present work uses a coupled approach to predict the limit …
Flame macrostructures, combustion instability and extinction strain scaling in swirl-stabilized premixed CH4/H2 combustion
In this paper, we report results from an experimental investigation on transitions in the
average flame shape (or microstructure) under acoustically coupled and uncoupled …
average flame shape (or microstructure) under acoustically coupled and uncoupled …
Nonlinear combustion instability analysis based on the flame describing function applied to turbulent premixed swirling flames
Instability analysis of swirling flames is of importance in the design of advanced combustor
concepts for aircraft propulsion and powerplant for electricity production. Thermoacoustic …
concepts for aircraft propulsion and powerplant for electricity production. Thermoacoustic …
Flame dynamics of a variable swirl number system and instability control
Swirling flame dynamics is investigated using a radial swirler equipped with movable
blades. This device allows to continuously change the swirl number and to examine various …
blades. This device allows to continuously change the swirl number and to examine various …
Partial premixing and stratification in turbulent flames
AR Masri - Proceedings of the Combustion institute, 2015 - Elsevier
This paper reviews recent advances in understanding the structure of turbulent partially
premixed and stratified flames. The term “partially premixed” refers here to compositionally …
premixed and stratified flames. The term “partially premixed” refers here to compositionally …
Combining a Helmholtz solver with the flame describing function to assess combustion instability in a premixed swirled combustor
Limit cycles of combustion instabilities can be estimated by studying the nonlinear behavior
of flame dynamics. In the present study the flame describing function (FDF) framework is …
of flame dynamics. In the present study the flame describing function (FDF) framework is …
Principles of non-intrusive diagnostic techniques and their applications for fundamental studies of combustion instabilities in gas turbine combustors: A brief review
Combustion instabilities are often manifested in modern fuel-lean gas turbine combustors.
Investigating the mechanisms and developing control strategies for combustion instabilities …
Investigating the mechanisms and developing control strategies for combustion instabilities …
Deterministic quantities characterizing noise driven Hopf bifurcations in gas turbine combustors
N Noiray, B Schuermans - International Journal of Non-Linear Mechanics, 2013 - Elsevier
Lean premix gas turbine combustors are prone to high amplitude pressure oscillations
driven by non-linear thermoacoustic coupling. These pulsations are unwanted because they …
driven by non-linear thermoacoustic coupling. These pulsations are unwanted because they …