Understanding the role of flow dynamics in thermoacoustic combustion instability

J O'Connor - Proceedings of the Combustion Institute, 2023 - Elsevier
Thermoacoustic combustion instability is one of the most challenging operational issues in
several high-performance, low-emissions combustion technologies, including gas turbines …

Rijke tube: A nonlinear oscillator

K Manoj, SA Pawar, J Kurths, RI Sujith - Chaos: An Interdisciplinary …, 2022 - pubs.aip.org
Dynamical systems theory has emerged as an interdisciplinary area of research to
characterize the complex dynamical transitions in real-world systems. Various nonlinear …

Analysis of unsteady mixed convection of Cu–water nanofluid in an oscillatory, lid-driven enclosure using lattice Boltzmann method

M Valizadeh Ardalan, R Alizadeh, A Fattahi… - Journal of Thermal …, 2021 - Springer
The unsteady physics of laminar mixed convection in a lid-driven enclosure filled with Cu–
water nanofluid is numerically investigated. The top wall moves with constant velocity or with …

Nonlinear self-excited thermoacoustic oscillations of a ducted premixed flame: bifurcations and routes to chaos

K Kashinath, IC Waugh, MP Juniper - Journal of Fluid Mechanics, 2014 - cambridge.org
Thermoacoustic systems can oscillate self-excitedly, and often non-periodically, owing to
coupling between unsteady heat release and acoustic waves. We study a slot-stabilized two …

Intermittency route to self-excited chaotic thermoacoustic oscillations

Y Guan, V Gupta, LKB Li - Journal of Fluid Mechanics, 2020 - cambridge.org
In nonlinear dynamics, there are three classic routes to chaos, namely the period-doubling
route, the Ruelle–Takens–Newhouse route and the intermittency route. The first two routes …

Learning thermoacoustic interactions in combustors using a physics-informed neural network

S Mariappan, K Nath, GE Karniadakis - Engineering Applications of …, 2024 - Elsevier
Many gas turbine and rocket engines exhibit unwanted combustion instability at the
experimental testing phase. Instability leads to large amplitude pressure oscillations and …

Open-loop control of periodic thermoacoustic oscillations: experiments and low-order modelling in a synchronization framework

Y Guan, V Gupta, K Kashinath, LKB Li - Proceedings of the Combustion …, 2019 - Elsevier
Open-loop forcing is known to be an effective strategy for controlling self-excited
thermoacoustic oscillations, but the details of this synchronization process have yet to be …

[HTML][HTML] Nonlinear dynamics of a self-excited thermoacoustic system subjected to acoustic forcing

S Balusamy, LKB Li, Z Han, MP Juniper… - Proceedings of the …, 2015 - Elsevier
We experimentally study the nonlinear dynamics of a self-excited thermoacoustic system
subjected to acoustic forcing. Our aim is to relate these dynamics to the behavior of universal …

Control of self-excited thermoacoustic oscillations using transient forcing, hysteresis and mode switching

Y Guan, W He, M Murugesan, Q Li, P Liu, LKB Li - Combustion and Flame, 2019 - Elsevier
In many combustion devices, strong self-excited flow oscillations can arise from feedback
between unsteady heat release and acoustics, resulting in increased vibration and pollutant …

Strange nonchaotic and chaotic attractors in a self-excited thermoacoustic oscillator subjected to external periodic forcing

Y Guan, M Murugesan, LKB Li - Chaos: An Interdisciplinary Journal of …, 2018 - pubs.aip.org
We experimentally investigate the synchronization dynamics of a self-excited
thermoacoustic system forced beyond its phase-locked state. The system consists of a …