Results 1 to 10 of about 139,473 (195)
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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Transfer Functions of Ammonia and Partly Cracked Ammonia Swirl Flames
Energies, 2023 The replacement of hydrocarbon fuels by ammonia in industrial systems is challenging due to its low burning velocity, its narrow flammability range, and a large production of nitric oxide and nitrogen dioxide when burned close to stoichiometric ...
Nader N. Shohdy +2 more
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Fluids, 2022 Convective velocity perturbations (CVPs) are known to play an important role in the response of flames to acoustic perturbations and in thermoacoustic combustion instabilities.
Thomas Steinbacher, Wolfgang Polifke
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Aerospace, 2023 Combustion instability constitutes the primary loss source of combustion chambers, gas turbines, and aero engines, and it affects combustion performance or results in a sudden local oscillation.
Nan Meng, Feng Li
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Numerical investigation of the premixed V-flame stabilization and blowout [PDF]
مهندسی مکانیک شریف, 2021 Global warming and high fossil fuel consumption increase the application of the low-Nox burner with lean-premixed combustion. However, this type of combustion is more susceptible to thermoacoustic instabilities.
N. Nabatian
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Dynamics of stratified swirl flame near lean blow out
Propulsion and Power Research, 2021 This paper studies the flame dynamics near lean blowout (LBO) conditions in a stratified swirl burner. The novel BASIS burner is used and fueled with premixed methane/air mixture at atmospheric conditions.
Meng Han +3 more
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Ultra-Lean Gaseous Flames in Terrestrial Gravity Conditions
Fluids, 2021 Development of the combustion process in the gaseous mixtures of near-limit composition is of great interest for fundamental aspects of combustion theory and fire-safety applications.
Ivan Yakovenko +2 more
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Nonlinear dynamics of upward propagating flames
Physical Review E, 2023 We study the influence of gravity on the dynamics of upward propagating premixed flames. We show that the role of gravity on the dispersion relation is small, but that the nonlinear effects are large. Using a Michelson Sivashinsky equation modified with a gravity term, it can be observed that the nonlinear dynamics of the crests is greatly influenced ...
Battikh, Mariam +4 more
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Autoignition flame dynamics in sequential combustors [PDF]
Combustion and Flame, 2018 Abstract This numerical study investigates the linear and non-linear flame dynamics in the second stage of a sequential combustor, with methane fuel injection into vitiated hot gas. It focuses on the heat release rate response of the sequential flame to entropy waves.
Oliver Schulz, Nicolas Noiray
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Energies, 2021 The present paper compares the flow structure and flame dynamics during combustion of methane and syngas in a model gas-turbine swirl burner. The burner is based on a design by Turbomeca.
Vladimir Dulin +8 more
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