Experimental and numerical investigation of stability and emissions of hydrogen-assisted oxy-methane flames in a multi-hole model gas-turbine burner

Araoye, Abdulrazaq A.; Abdelhafez, Ahmed; Habib, Mohamed A.; Ben‐Mansour, Rached

doi:10.1016/j.ijhydene.2021.03.135

Cited by 22 publications

(17 citation statements)

References 49 publications

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“…Few experimental ,− and numerical works have been carried out to study the flame behavior of the multihole combustor. Funke et al experimentally examined the performances of two micromix type multihole combustors with nozzle diameters of 0.3 mm (1600 nozzles) and 0.84 mm (300 nozzles) in hydrogen-enriched methane air combustion.…”

Section: Introductionmentioning

confidence: 99%

“…9 In addition, the spacings between the inlets in multihole combustor act as hot anchor points between the flamelets and aides in flame stabilization. 10 Few experimental 3,11−13 and numerical 14 works have been carried out to study the flame behavior of the multihole combustor. Funke et al 15 experimentally examined the performances of two micromix type multihole combustors with nozzle diameters of 0.3 mm (1600 nozzles) and 0.84 mm (300 nozzles) in hydrogen-enriched methane air combustion.…”

Section: Introductionmentioning

confidence: 99%

“…Abdelhafez et al 13 experimentally investigated the jet spacing and jet diameter in the multihole combustor and reported that an increase in both these parameters unfavorably affects the flame stability. Araoye et al 14 studied the CH 4 /H 2 /O 2 /CO 2 flames in a multihole combustor through both experimental and numerical analyses. The study reported that the Damköhler number ( Da ) and Karlovitz number increases with the increase in HF.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Highly CO₂-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

et al. 2022

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Premixed oxy-propane flames are investigated numerically in a multihole model gas turbine combustor at various inlet mixture compositions over a range of equivalence ratios (Ø: 0.241−0.500), oxygen fractions (OF: 32.4−60.0%), and adiabatic flame temperatures (T ad : 1600−1900 K) at a constant bulk throat velocity of 5.2 m/s. The flames in multihole combustors are highly influenced by their corresponding adiabatic flame temperatures. Similar flame shapes are observed at constant T ad , where cases with (Ø = 0.241, OF = 60%) and (Ø = 0.50, OF = 32.4%) both represent lifted flames at T ad = 1600 K, anchored flames in (Ø = 0.276, OF = 60%) and (Ø = 0.50, OF = 36.6%) at T ad = 1750 K, and anchored stronger flames in cases (Ø = 0.313, OF = 60%), (Ø = 0.392, OF = 50%), and (Ø = 0.50, OF = 40.8%) at T ad = 1900 K. Flames in a multihole combustor are characterized by the presence of an outer recirculation zone (ORZ) only. In comparison with a swirlstabilized combustor in identical inlet conditions, flames in a multihole combustor demonstrate a lower Damkoḧler number (Da), higher flame thickness, elevated pattern factor, and increased CO emission. Due to the reduced vorticity level because of the absence of swirl motion, the multihole flames have higher axial temperature than the swirl-stabilized ones.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Highly CO₂-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

et al. 2022

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“…7 The EGR becomes even more beneficial in combustion with pure oxygen, commonly known as oxy-fuel combustion. 8,9 Unlike the air-fuel counterpart, oxy-combustion burns the fuel in pure oxygen without the presence of nitrogen inside the combustor. Due to the nitrogen-free environment, there is no NOx emission from the combustion process and results mainly in CO 2 and H 2 O in the tail pipe.…”

Section: Introductionmentioning

confidence: 99%

“…Exhaust gas recirculation (EGR) is an effective way to deal with the unburnt flue gas and recover the heat from the exhaust stream 7 . The EGR becomes even more beneficial in combustion with pure oxygen, commonly known as oxy‐fuel combustion 8,9 . Unlike the air‐fuel counterpart, oxy‐combustion burns the fuel in pure oxygen without the presence of nitrogen inside the combustor.…”

Section: Introductionmentioning

confidence: 99%

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Haque

Nemitallah

Abdelhafez

et al. 2022

Intl J of Energy Research

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Premixed oxy-combustion flames of methane, syngas (CH 4 :CO:H 2 with the molar ratio of 2:1:1), and propane in CO 2 -diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (T ad ), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic "V" shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of T ad , LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights• Increasing equivalence ratio improves the flame characteristics but increases CO emission.• Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ).• Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO.

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Hydrogen combustion, production, and applications: A review

Habib,

Abdulrahman,

Alquaity

et al. 2024

Alexandria Engineering Journal

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Experimental and numerical investigation of stability and emissions of hydrogen-assisted oxy-methane flames in a multi-hole model gas-turbine burner

Cited by 22 publications

References 49 publications

Analysis of Highly CO₂-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

Analysis of Highly CO₂-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Hydrogen combustion, production, and applications: A review

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Experimental and numerical investigation of stability and emissions of hydrogen-assisted oxy-methane flames in a multi-hole model gas-turbine burner

Cited by 22 publications

References 49 publications

Analysis of Highly CO2-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

Analysis of Highly CO2-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Hydrogen combustion, production, and applications: A review

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Analysis of Highly CO₂-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor

Analysis of Highly CO₂-Diluted Oxy-propane Flames Stabilized over a Multihole Burner of a Model Gas Turbine Combustor