A study on the effects of porous structure on the environmental and radiative characteristics of cylindrical Ni-Al burners

Maznoy, Anatoly; Kirdyashkin, A. I.; Minaev, Sergey; Markov, A. B.; Pichugin, N.; Yakovlev, E. V.

doi:10.1016/j.energy.2018.07.017

Cited by 27 publications

(4 citation statements)

References 49 publications

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“…Experimental tests on powders incorporated into polystyrene thin films confirmed the efficiency of the proposed solution. [28] and [29], concluded that utilizing hollow cylindrical double-layer porous media with suitable pore size and number led to improvements in the combustion temperature and the efficiency of hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Identification of the Effective Radiative Properties of Cylindrical Packed Bed Porous Media

Bouraoui,

Nejma

2024

1790-5044

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Understanding radiative exchange in a porous medium is a crucial step that can provide significant insights and improvements in its characteristics, enhancing its practical utility across various industrial applications. In this paper, a numerical model, utilizing the finite element method (FEM), was developed to predict the radiative transfer between a diffusely/specularly reflecting cylindrical packed bed porous medium and a plane heating surface. Four different structures of the medium were suggested to examine the effect of the particles ‘disposition on the radiative properties of the medium. The assessment of normalized flux distribution enables the computation of effective radiative properties including reflectivity, transmissivity, and absorptivity for particles exhibiting diffuse and specular reflection. The results underscore the significant influence of particle arrangement on media properties. The structure of the second model allowed for the attainment of an opaque surface from the first layer. Meaningful correlations can be established from the presented curves, offering a streamlined and accurate method for determining effective radiative property coefficients based on emissivity in future model applications.

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Section: Introductionmentioning

confidence: 99%

Identification of the Effective Radiative Properties of Cylindrical Packed Bed Porous Media

Bouraoui,

Nejma

2024

1790-5044

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“…Both external and internal regimes of combustion were seen. Maznoy et al 19 studied environmental emissions of a cylindrical Ni‐Al burner. According to their results, at equivalence ratios <0.77, NOx concentrations decrease considerably.…”

Section: Introductionmentioning

confidence: 99%

“…Although experiments are done on flat porous media in the previous papers, the geometry of the porous medium used in this experiment is cylindrical on which studies are very limited. 18,19,29,32,33 2 | EXPERIMENTAL APPARATUS Figure 1 shows the overall schematic representation of the device and measurement instruments. The experimental device is formed from a bilayer steel shell.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, according to the above‐mentioned studies, the structure and shape of the porous medium have a considerable effect on the performance of the burner. Although experiments are done on flat porous media in the previous papers, the geometry of the porous medium used in this experiment is cylindrical on which studies are very limited 18,19,29,32,33 …”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of premixed combustion and thermal efficiency in a porous heating burner

Omidi

Emami

2020

Int J Energy Res

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Summary In the present research, thermal efficiency and the amount of pollutant emissions of a metallic porous burner with a heat exchanger were investigated experimentally. A very important issue about these burners is the stability of flame on the surface of the porous medium. In the present research, through creating a surface flame in the porous medium, the performance of the burner was observed. In this article, by changing the factors like thermal power and equivalence ratio, thermal efficiency and the amount of pollutants were studied. Results showed that the best performance of the burner occurred when the equivalence ratio was 0.8. The maximum thermal efficiency of 39.43% occurred at an equivalence ratio of 0.8 and thermal power of 100 kW. As thermal power increased, the amount of emitted nitric oxide (NOx) increased. Approximately at all measured conditions, the amount of emitted NOx was less than 15 ppm. Also, the amount of emission carbon monoxide (CO) at an equivalence ratio of 0.8 and thermal power of 100 kW was the lowest. In this research, results of the porous burner were compared to the free flame burner and the results revealed that in the best condition, thermal efficiency was improved up to 5.8%. Accordingly, the amount of emitted NOx was reduced strongly but the amount of CO of the porous burner was much more than the open flame burner.

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Fuel interchangeability for lean premixed combustion in cylindrical radiant burner operated in the internal combustion mode

Maznoy

Pichugin

Yakovlev

et al. 2021

Applied Thermal Engineering

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A study on the effects of porous structure on the environmental and radiative characteristics of cylindrical Ni-Al burners

Cited by 27 publications

References 49 publications

Identification of the Effective Radiative Properties of Cylindrical Packed Bed Porous Media

Identification of the Effective Radiative Properties of Cylindrical Packed Bed Porous Media

Experimental investigation of premixed combustion and thermal efficiency in a porous heating burner

Fuel interchangeability for lean premixed combustion in cylindrical radiant burner operated in the internal combustion mode

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