Results 31 to 40 of about 1,024 (213)
Complexity, Volume 2021, Issue 1, 2021., 2021 The complex bursting oscillation and bifurcation mechanisms in coupling systems of different scales have been a hot spot domestically and overseas. In this paper, we analyze the bursting oscillation of a generalized Duffing–Van der Pol system with periodic excitation.
Youhua Qian +3 more
wiley +1 more source
On the mechanism by which nose bluntness suppresses second-mode instability
Theoretical and Applied Mechanics Letters, 2020 : A physical mechanism by which nose bluntness suppresses second-mode instability is proposed. Considered are 7 degree half-angle straight cones with nose bluntness radii of 0.15 mm, 3.556 mm, 5 mm, 9.525 mm, 12.7 mm and 25.4 mm at tunnel conditions ...
Armani Batista +2 more
doaj +1 more source
Acoustic Triggering of Combustion Instability in a Swirling Flame: An Experimental Study
Energies, 2023 Combustion instability is a common thermoacoustic coupling problem in combustion systems, and the pressure oscillations generated inevitably damage the combustion system. Studying the mechanism of combustion instability, especially the triggering problem
Yunpeng Liu +3 more
doaj +1 more source
Accounting for convective effects in zero-Mach-number thermoacoustic models [PDF]
, 2014 This paper presents a methodology to account for some mean-flow effects on thermo-acoustic instabilities when using the zero-Mach-number assumption. It is shown that when a computational domain is represented under the M=0 assumption, a nonzero-Mach ...
Nicoud, F. +5 more
core +1 more source
Aerospace, 2021 In the present work, 3D Unsteady Reynolds-Averaged Navier-Stokes (URANS) simulations are performed to investigate the generation and mitigation mechanism of combustion-sustained thermoacoustic instabilities in a modelled swirl combustor.
Yuze Sun, Dan Zhao, Xiaowei Zhu
doaj +1 more source
Onset of thermoacoustic instability in turbulent combustors: an emergence of synchronized periodicity through formation of chimera-like states [PDF]
, 2017 Thermoacoustic systems with a turbulent reactive flow, prevalent in the fields of power and propulsion, are highly susceptible to oscillatory instabilities.
Mondal, Sirshendu +2 more
core +1 more source
Complex system approach to investigate and mitigate thermoacoustic instability in turbulent combustors [PDF]
, 2020 Thermoacoustic instability in turbulent combustors is a nonlinear phenomenon resulting from the interaction between acoustics, hydrodynamics, and the unsteady flame.
Unni, Vishnu R. +3 more
core +1 more source
IEEE Access, 2023 This paper proposes an adaptive scheme for the boundary stabilization of thermoacoustic instability in the Rijke tube system using the backstepping method. The mathematical model of the system is characterized by a $2\times 2$ linear hyperbolic partial
Elham Aarabi +2 more
doaj +1 more source
Intermittency route to thermoacoustic instability in turbulent combustors [PDF]
, 2014 The dynamic transition from combustion noise to combustion instability was investigated experimentally in two laboratory-scale turbulent combustors (namely, swirl-stabilized and bluff-body-stabilized backward-facing-step combustors) by systematically ...
Thampi, Gireeshkumaran +2 more
core +1 more source
Multifractal analysis of flame dynamics during transition to thermoacoustic instability in a turbulent combustor [PDF]
, 2020 Gas turbine combustors are susceptible to thermoacoustic instability, which manifests as large amplitude periodic oscillations in acoustic pressure and heat release rate.
George, Nitin B. +5 more
core +1 more source