Examination of thermo-acoustic instability in a low swirl burner

Emadi, Majid; Kaufman, K.; Burkhalter, M.; Salameh, T.; Gentry, T. P.; Ratner, Albert

doi:10.1016/j.ijhydene.2015.08.016

Cited by 22 publications

(7 citation statements)

References 37 publications

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“…Such a situation is known as a resonance that is characterized by high-amplitude pressure pulsations . Other than the variations in equivalence ratio (leading to pressure fluctuation in combustors of low Mach number, which eventually result in oscillations of oxidizer flow at the fuel injection point), another mechanism that contributes to combustion instabilities is thermo-acoustic coupling. , Recently, several techniques are being proposed to avert the circumstance of those oscillations in a combustion system while maintaining a wide range of operability.…”

Section: Introductionmentioning

confidence: 99%

“…7 Other than the variations in equivalence ratio (leading to pressure fluctuation in combustors of low Mach number, which eventually result in oscillations of oxidizer flow at the fuel injection point), another mechanism that contributes to combustion instabilities is thermo-acoustic coupling. 10,11 Recently, several techniques are being proposed to avert the circumstance of those oscillations in a combustion system while maintaining a wide range of operability. Kedia and Ghoniem 12 investigated the mechanism of flame stabilization and the circumstances steering the blowoff of a premixed laminar flame attached downstream of a multihole/ perforated-plate burner, nearly at adiabatic conditions.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

et al. 2019

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This paper presents the results of an experimental investigation of combustion characteristics of nonswirl CH4/CO2/O2 flames under atmospheric pressure in a lean-premixed multihole burner’s gas-turbine model combustor. The CO2 and O2 are well premixed and then channeled to a test rig, which is made up of a 2 in. diameter 1 m long pipe to premix the fuel and oxidizers before getting to the multihole burner. The burner consists of main holes and subholes that prevent flashbacks that may lead to rig explosion. The burner imparts jet to the premixed measured composition of CH4/CO2/O2. The results indicated that the adiabatic flame temperature (T ad) is a strong controlling parameter in quantifying the stability map and combustor flame shape; variation in oxygen fraction and equivalence ratio influence the flame shape, whereas the equivalence ratio (ϕ) is the major controlling parameter of temperature distribution within the combustor. The results also indicated that the stability map does not follow the lines of constant power density, mass flow rate of the mixture (ṁ mix), and Reynolds number (Re).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

et al. 2019

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“…Creation of a swirl-induced recirculation zone downstream of the burner is an efficient way of stabilizing the flame when a physical flame holder is not available. 35,36 At a certain level, such pressure waves could be destructive and may result in damage of the combustor hardware. [32][33][34] Permanent damages may occur when the frequencies of oscillations interfere constructively with the cold-flow frequencies and/or natural frequencies of the combustionsystem geometry, a situation that is known as resonance and characterized by high amplitude pressure pulsations.…”

Section: Combustion Instabilities and Solution Techniquesmentioning

confidence: 99%

“…On the other hand, dynamic instabilities, or thermos-acoustics, are generated because of coupling between the heat release and the acoustic fluctuations of pressure resulting in unwanted pressure waves. 35,36 At a certain level, such pressure waves could be destructive and may result in damage of the combustor hardware. 37,38 Premixed combustion is considered stable when the amplitude of pressure fluctuation is less than 5% of the mean chamber pressure.…”

Section: Combustion Instabilities and Solution Techniquesmentioning

confidence: 99%

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

et al. 2019

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Summary The use of fossil fuel is expected to increase significantly by midcentury because of the large rise in the world energy demand despite the effective integration of renewable energies in the energy production sector. This increase, alongside with the development of stricter emission regulations, forced the manufacturers of combustion systems, especially gas turbines, to develop novel combustion techniques for the control of NOx and CO2 emissions, the latter being a greenhouse gas responsible for more than 60% to the global warming problem. The present review addresses different burner designs and combustion techniques for clean power production in gas turbines. Combustion and emission characteristics, flame instabilities, and solution techniques are presented, such as lean premixed air‐fuel (LPM) and premixed oxy‐fuel combustion techniques, and the combustor performance is compared for both cases. The fuel flexibility approach is also reviewed, as one of the combustion techniques for controlling emissions and reducing flame instabilities, focusing on the hydrogen‐enrichment and the integrated fuel‐flexible premixed oxy‐combustion approaches. State‐of‐the‐art burner designs for gas turbine combustion applications are reviewed in this study, including stagnation point reverse flow (SPRF) burner, dry low NOx (DLN) and dry low‐emission (DLE) burners, EnVironmental burners (including EV, AEV, and SEV burners), perforated plate (PP) burner, and micromixer (MM) burner. Special emphasis is made on the MM combustor technology, as one of the most recent advances in gas turbines for stable premixed flame operation with wide turndown and effective control of NOx emissions. Since the generation of pure oxygen is prerequisite to oxy‐combustion, oxygen‐separation membranes became of immense importance either for air separation for clean oxy‐combustion applications or for conversion/splitting of the effluent CO2 into useful chemical and energy products. The different carbon‐capture technologies, along with the most recent carbon‐utilization approaches towards CO2 emissions control, are also reviewed.

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“…The dynamical behavior of confined low-swirl flames has been the subject of several experimental and numerical studies [10][11][12][13][14][15][16]. Therkelsen et al [14] analyzed CH 4 -air and H 2 /CH 4 -air flames that presented self-sustained thermo-acoustic instabilities.…”

Section: Introductionmentioning

confidence: 99%

Study of a thermo-acoustic instability triggering in a low-swirl burner using simultaneous time-resolved acetone and OH-PLIF

Renaud

Yokomori

Tachibana

2019

Proceedings of the Combustion Institute

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Examination of thermo-acoustic instability in a low swirl burner

Cited by 22 publications

References 37 publications

Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

Study of a thermo-acoustic instability triggering in a low-swirl burner using simultaneous time-resolved acetone and OH-PLIF

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Examination of thermo-acoustic instability in a low swirl burner

Cited by 22 publications

References 37 publications

Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

Characteristics of Oxyfuel Combustion in Lean-Premixed Multihole Burners

Frontiers in combustion techniques and burner designs for emissions control and CO2capture: A review

Study of a thermo-acoustic instability triggering in a low-swirl burner using simultaneous time-resolved acetone and OH-PLIF

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Product

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About

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review