Journal ArticleDOI
Spatiotemporal dynamics and early detection of thermoacoustic combustion instability in a model rocket combustor
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TLDR
The turbulence network, which consists of nodes and vertexes in weighted networks between vortices, can characterize the complex spatiotemporal structure of a flow field during thermoacoustic combustion instability.Abstract:
We numerically study the spatiotemporal dynamics and early detection of thermoacoustic combustion instability in a model rocket combustor using the theories of complex networks and synchronization. The turbulence network, which consists of nodes and vertexes in weighted networks between vortices, can characterize the complex spatiotemporal structure of a flow field during thermoacoustic combustion instability. The transfer entropy allows us to identify the driving region of thermoacoustic combustion instability. In addition to the order parameter, a phase parameter newly proposed in this study is useful for capturing the precursor of thermoacoustic combustion instability.read more
Citations
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Complex system approach to investigate and mitigate thermoacoustic instability in turbulent combustors
R. I. Sujith,Vishnu R. Unni +1 more
TL;DR: In this article, the authors discuss various prognosis and mitigation strategies for thermo-acoustic instability based on complex system theory in turbulent combustors, where the authors view the thermoacoustic system in a turbulent combustor as a complex system and the dynamics exhibited by the system is perceived as emergent behaviors of this complex system.
Journal ArticleDOI
A review on turbulent and vortical flow analyses via complex networks
TL;DR: The present review can boost future network-based research on turbulent and vortical flows, promoting the establishment of complex networks as a widespread tool for turbulence analysis.
Journal ArticleDOI
Input-output system identification of a thermoacoustic oscillator near a Hopf bifurcation using only fixed-point data.
TL;DR: This study constitutes an experimental demonstration of system identification on a reacting flow using only prebifurcation data, opening up pathways to the development of early warning indicators for nonlinear dynamical systems near a Hopf bIfurcation.
Journal ArticleDOI
Dynamic behavior of intermittent combustion oscillations in a model rocket engine combustor
TL;DR: In this paper, the dynamic behavior of intermittent combustion oscillations by time series analysis in terms of nonlinear forecasting, symbolic dynamics, and statistical complexity, including the detection of the change in dynamical state based on symbolic dynamics and graph networks.
Journal ArticleDOI
Attenuation behavior of thermoacoustic combustion instability analyzed by a complex-network- and synchronization-based approach.
Shogo Murayama,Hiroshi Gotoda +1 more
TL;DR: The decrease in the periodicity of noisy-periodic oscillations in a flow velocity field significantly affects the mutual coupling, resulting in the suppression of thermoacoustic combustion instability.
References
More filters
Journal ArticleDOI
Measuring information transfer.
TL;DR: An information theoretic measure is derived that quantifies the statistical coherence between systems evolving in time and is able to distinguish effectively driving and responding elements and to detect asymmetry in the interaction of subsystems.
Journal ArticleDOI
Dynamics and stability of lean-premixed swirl-stabilized combustion
Ying Huang,Vigor Yang +1 more
TL;DR: A comprehensive review of the advances made over the past two decades in this area is provided in this article, where various swirl injector configurations and related flow characteristics, including vortex breakdown, precessing vortex core, large-scale coherent structures, and liquid fuel atomization and spray formation are discussed.
Book
Liquid rocket engine combustion instability
Vigor Yang,William E. Anderson +1 more
TL;DR: In this article, the first published in the United States on the subject since NASA's Liquid Rocket Combustion Instability (NASA SP-194) in 1972, the authors cover four major subject areas: engine phenomenology and case studies, fundamental mechanisms of combustion instability, combustion instability analysis and engine and component testing.
Journal ArticleDOI
Transverse combustion instabilities: Acoustic, fluid mechanic, and flame processes
TL;DR: In this paper, the authors present a review of transverse acoustic wave motions in air-breathing systems and discuss issues associated with simulating or scaling instabilities, either in subscale experimental geometries or by attempting to understand instability physics using identical axial oscillations of the same frequency as the transverse mode of interest.
Journal ArticleDOI
Intermittency route to thermoacoustic instability in turbulent combustors
TL;DR: In this article, the dynamic transition from combustion noise to combustion instability was investigated experimentally in two laboratory-scale turbulent combustors (namely, swirl-stabilized and bluff-body-stable backward-facing-step combustors) by systematically varying the flow Reynolds number.
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