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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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Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry
Aerospace, 2019 With the goal of assessing the capability of Computational Fluid Dynamics (CFD) to simulate combustion instabilities, the present work considers a premixed, bluff-body-stabilized combustor with well-defined inlet and outlet boundary conditions.
Esteban Gonzalez-Juez
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Numerical study of the lean premixed PRECCINSTA burner with hydrogen enrichment [PDF]
E3S Web of Conferences, 2021 Hydrogen combustion is one of the most promising solution to achieve a global decarbonization in power production and transports. Pure hydrogen combustion is far from becoming a standard but, during the energy transition, hydrogen co-firing can be a ...
Filomeno Giovanni +3 more
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Aerospace, 2023 Solid rocket motors are prone to combustion instabilities, which may lead to various problems for the rockets, from unexpected oscillations, precision decreasing, to explosion.
Zhuopu Wang, Wenchao Zhang, Yuanzhe Liu
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loop-shaping control of azimuthal combustion instabilities in annular combustors
Journal of Low Frequency Noise, Vibration and Active Control, 2021 Lean combustion technique and annular geometries are preferred in aero-engines and gas turbines, which however may lead to azimuthal combustion instabilities. Active control can be used to stabilize combustion instabilities.
Sheng Feng, Jingxuan Li
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A Mathematical and Numerical Model for the Analysis of Hybrid Rocket Motors [PDF]
INCAS Bulletin, 2011 The hybrid rocket motors (HRM) use a two-phase propellant system. This offers some remarkable advantages but also arises some difficulties like the neutralization of their instabilities.
Florin MINGIREANU, Marius STOIA-DJESKA
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Novel In-Service Combustion Instability Detection Using the Chirp Fourier Higher Order Spectra
International Journal of Prognostics and Health Management, 2017 Combustion instabilities, known as “rumble” and “screech” are the self-excited aerodynamic instabilities in the gas turbine combustor. They cause the premature failures of the gas turbine components, and, consequently, the failure of the gas turbine as a
Len Gelman +3 more
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Journal of the Global Power and Propulsion Society, 2018 Recently, because of environmental regulations, gas turbine manufacturers are restricted to produce machines that work in the lean combustion regime. Gas turbines operating in this regime are prone to combustion-driven acoustic oscillations referred as ...
Dmytro Iurashev +5 more
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Fluids, 2020 A recent predictive scenario of premixed flame propagation in unobstructed passages is extended to account for obstructions that can be encountered in facilities dealing with explosive materials such as in coalmines.
Furkan Kodakoglu +3 more
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Pulsating regimes of flames propagation in a model with chain-branching reaction [PDF]
Компьютерные исследования и моделирование, 2009 In this paper we investigate propagation of planar combustion waves in an adiabatic model with two-step chain branching reaction mechanism. Pulsating instabilities are found to emerge for fuel Lewis number greater than one due to a Hopf bifurcation.
V. V. Gubernov +2 more
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