Combustion characteristics of premixed propane/hydrogen/air in the micro-planar combustor with different channel-heights

Tang, Aikun; Deng, Jiang; Cai, Tao; Xu, Yiming; Pan, Jianfeng

doi:10.1016/j.apenergy.2017.05.187

Cited by 82 publications

(7 citation statements)

References 40 publications

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“…As a consequence, studies on the flame characteristics resulted from the pipeline leakage were conducted for both the normal atmospheric pressure [2] and the reduced pressure [3], in which the flame height correlations for different atmospheric pressures were proposed. Since gaseous fuels have been used to provide energy in many fields, its combustion as well as flame characteristics during the energy utilization and transportation have been studied extensively [4][5][6][7][8][9]. Zhang et al [4] proposed a mathematical model for flame volume estimation.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on flame morphologic characteristics of wall attached non-premixed buoyancy driven turbulent flames

Zhang

Delichatsios

et al. 2019

Applied Energy

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This work investigates the effects of the wall on the morphologic characteristics of non-premixed buoyancy driven turbulent flames attached to the wall. Experiments are carried out with rectangular burners having their long side attached to a wall. The investigation is based on dimensional analysis and comprehensive experimental data, including comparison of the flame characteristics of the wall attached flames with free flames. Results show that the non-dimensional flame heights of wall attached flames experience a two-dimensional to three-dimensional transition as free flames do. The critical dimensionless heat release rate for this transition is smaller for the wall attached flames (0.30) than that of the free flames (0.39). The flame height fluctuation of wall attached flames is smaller than that of free flames and decreases with an increase in the nozzle aspect ratio. The ratio of flame thickness (or flame width) to flame height of wall attached flames is smaller than that of free flames. New correlations for flame height, width and thickness of the wall attached flames are proposed based on the mirror-approach of the rectangular source relative to that of a free flame, where the burner perimeter is found to be an appropriate length scale. This work provides important knowledge on the effect of wall on flame characteristics of buoyancy driven buoyant turbulent flames, which is essential to the design and risk assessment of the laying of gaseous fuel transportation pipelines in the city and also provides data for validation of computational fluid dynamics (CFD) models.

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Section: Introductionmentioning

confidence: 99%

“…Zhang et al [4] proposed a mathematical model for flame volume estimation. Tang et al [5] studied the combustion behavior of premixed propane flame with hydrogen addition in a combustor. Wierzbicki et al…”

Section: Introductionmentioning

confidence: 99%

Experimental study on flame morphologic characteristics of wall attached non-premixed buoyancy driven turbulent flames

Zhang

Delichatsios

et al. 2019

Applied Energy

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“…Swiss-roll combustor and combustor with a vacuum regenerator were designed to reduce large heat loss through the wall due to high surface to volume ratio and to stabilize combustion [6,7]. The effect of the calorific value of fuel on the flammability limit was investigated and the flammability limit was improved by adding H2 with the high calorific value to the hydrocarbon/air mixture [8,9].…”

Section: Introductionmentioning

confidence: 99%

Structure Optimization of Guide Vane on Combustion Performance of Premixed H2/Air in Micro Cavity-Combustor

Kim

Pak³

et al. 2022

SSRN Journal

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“…Flame-wall interaction (FWI) is thus considered to be quite significant to the near-wall combustion process which can affect the flame stability, combustion efficiency and pollutant formations effectively [1,2]. Furthermore, with a recent trend of utilizing higher power density and downsizing design of combustor, the FWI is considered to be increasingly pivotal to obtain the stable and efficient combustion in the real combustors [3][4][5]. Hence, there exists a need to make more efforts on the investigation on the FWI and near-wall combustion properties of laminar/turbulent flames.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Flame Structure and CO/NO Formations of the Laminar Premixed Biogas–Hydrogen Impinging Flame in the Wall Vicinity

et al. 2021

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The near-wall flame structure and pollutant emissions of the laminar premixed biogas-hydrogen impinging flame were simulated with a detailed chemical mechanism. The spatial distributions of the temperature, critical species, and pollutant emissions near the wall of the laminar premixed biogas–hydrogen impinging flame were obtained and investigated quantitatively. The results show that the cold wall can influence the premixed combustion process in the flame front, which is close to the wall but does not touch the wall, and results in the obviously declined concentrations of OH, H, and O radicals in the premixed combustion zone. After flame quenching, a high CO concentration can be observed near the wall at equivalence ratios (φ) of both 0.8 and 1.2. Compared with that at φ = 1.0, more unburned fuel is allowed to pass through the quenching zone and generate CO after flame quenching near the wall thanks to the suppressed fuel consumption rate near the wall and the excess fuel in the unburned gases at φ = 0.8 and 1.2, respectively. By isolating the formation routes of NO production, it is found that the fast-rising trend of NO concentration near the wall in the post flame region at φ = 0.8 is attributed to the NO transportation from the NNH route primarily, while the prompt NO production accounts for more than 90% of NO generation in the wall vicinity at φ = 1.2. It is thus known that, thanks to the effectively increased surface-to-volume ratio, the premixed combustion process in the downsized chamber will be affected more easily by the amplified cooling effects of the cold wall, which will contribute to the declined combustion efficiency, increased CO emission, and improved prompt NO production.

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Combustion characteristics of premixed propane/hydrogen/air in the micro-planar combustor with different channel-heights

Cited by 82 publications

References 40 publications

Experimental study on flame morphologic characteristics of wall attached non-premixed buoyancy driven turbulent flames

Experimental study on flame morphologic characteristics of wall attached non-premixed buoyancy driven turbulent flames

Structure Optimization of Guide Vane on Combustion Performance of Premixed H2/Air in Micro Cavity-Combustor

Numerical Investigation on the Flame Structure and CO/NO Formations of the Laminar Premixed Biogas–Hydrogen Impinging Flame in the Wall Vicinity

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