Fingering Instability in Combustion [PDF]
Physical Review Letters, 1998 A thin solid (e.g., paper), burning against an oxidizing wind, develops a fingering instability with two decoupled length scales. The spacing between fingers is determined by the P clet number (ratio between advection and diffusion). The finger width is determined by the degree two dimensionality. Dense fingers develop by recurrent tip splitting.
Zik, O., Olami, Z., Moses, E.
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Combustion instability sustained by unsteady vortex combustion [PDF]
21st Joint Propulsion Conference, 1985 The determination of an internal feedback mechanism which leads to combustion instability inside a small scale laboratory combustor is presented in this paper. During combustion instability, the experimental findings show that a large vortical structure is formed at an acoustic resonant mode of the system.
Smith, D. A., Zukoski, E. E.
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Experimental Study of Flame Dynamics in a Triple-Injector Swirling Nonpremixed Combustor Under Different Thermoacoustic Self-Excited Instability Modes [PDF]
SensorsCombustion instability is one of the prominent and unavoidable problems in the design of high-performance propulsion systems. This study investigates the heat release rate (HRR) responses in a triple-nozzle swirling nonpremixed combustor under various ...
Xiang Zhang, Suofang Wang, Yong Liu
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Study on Suppression of Combustion Instability using Quarter Wavelength Tube [PDF]
Journal of Applied Fluid Mechanics, 2022 The passive suppression of combustion instability by quarter wavelength tube was hereby studied to absorb the oscillation pressure with large amplitudes caused by combustion instability.
C. Liu +5 more
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Experimental Studies on Suppression of Combustion Instability with the Addition of Helium [PDF]
Journal of Applied Fluid Mechanics, 2022 When combustion instability occurs, fluctuation in the release of heat couples with oscillating pressure, while the sensitivity of flame to acoustic disturbance restricts the oscillation intensity.
Y. Liu, J. Li, Z. Tian, T. Zhang, Y. Yan
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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
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Energies, 2021 A large eddy simulation (LES) and combustion instability analysis are performed using OpenFOAM for the multiple shear-coaxial injector combustor DLR-BKD (in German Deutsches Zentrum für Luft–Brennkammer D, German Aerospace Center–Combustion Chamber D ...
Won-Sub Hwang +7 more
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Analysis on Combustion Instability Characteristics of Model Swirl Combustor With Gas Fuel
发电技术, 2022 Combustion instability is easy to occur under lean combustion of gas turbine. Analyzing and predicting the characteristics of unstable combustion is of great significance to ensure the normal operation of combustion chamber. The flame describing function
HAO Jiangang +4 more
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Experimental Study on Dynamic Combustion Characteristics in Swirl-Stabilized Combustors
Energies, 2021 An experimental study was performed to investigate the combustion instability characteristics of swirl-stabilized combustors. A premixed gas composed of ethylene and air was burned under various flow and geometric conditions.
Donghyun Hwang, Kyubok Ahn
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Reactive Flow Dynamics of Low-Frequency Instability in a Scramjet Combustor
Aerospace, 2023 This study numerically investigated the combustion instability and characteristics of a laboratory-scale gaseous hydrogen-fueled scramjet combustor.
Seung-Min Jeong +4 more
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