The Ignition Energy Characteristics and Glow Kinetics of the Flames of Dispersed Coal Particles of Different Ranks under the Action of Laser Pulses Full article
| Journal |
Chemistry for Sustainable Development
ISSN: 1817-1818 |
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| Output data | Year: 2020, Volume: 28, Number: 6, Pages: 518–526 Pages count : 8 DOI: 10.15372/CSD2020260 | ||||
| Tags | coal, laser ignition, combustion, glow kinetics, ignition thresholds, ignition stages | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Federal Agency for Scientific Organizations | 0352-2016-0010, V.49.1.5 (АААА-А17-117041910150-2) |
| 2 | Russian Foundation for Basic Research | 20-43-420019 (АААА-А20-120061890039-9) |
Abstract:
Laser ignition (1064 nm, 120 μs) of the dispersed particles of different coal marks was studied. For all coal marks, three consecutive ignition stages with characteristic threshold radiation energy densities ( H cr) for each stage were discovered. With an increase in the rank, the values of the first ignition limit H cr(1) remain almost constant, the second ignition limit H cr(2) decreases, while the third ignition limit H cr(3) increases. Results of the investigation of kinetic dependencies of flame glow at different ignition stages arising under the action of laser pulses on coal particles are presented. The glow duration at the first ignition stage slightly exceeds the duration of the laser pulse and reaches 150 μs for all marks of coal. The glow duration at the second ignition stage at H = H cr(2) is in the millisecond time interval. With an increase in the energy density of laser radiation, the glow duration at the second ignition stage decreases to the submillisecond range as a result of an increase in the rates of thermochemical reactions. At the third ignition stage at H = H cr(3), the glow duration is 10-100 ms for different marks of coal. It was established that for the studied coals, the glow intensity increases from the moment of exposure to laser pulse. In the submillisecond range, a decrease in glow intensity was observed. The glow amplitude of coals increases linearly with an increase in the energy density of laser radiation.
Cite:
Aduev B.P.
, Nurmuhametov D.R.
, Kraft Y.V.
, Ismagilov Z.R.
The Ignition Energy Characteristics and Glow Kinetics of the Flames of Dispersed Coal Particles of Different Ranks under the Action of Laser Pulses
Chemistry for Sustainable Development. 2020. V.28. N6. P.518–526. DOI: 10.15372/CSD2020260 WOS РИНЦ OpenAlex
The Ignition Energy Characteristics and Glow Kinetics of the Flames of Dispersed Coal Particles of Different Ranks under the Action of Laser Pulses
Chemistry for Sustainable Development. 2020. V.28. N6. P.518–526. DOI: 10.15372/CSD2020260 WOS РИНЦ OpenAlex
Original:
Адуев Б.П.
, Нурмухаметов Д.Р.
, Крафт Я.В.
, Исмагилов З.Р.
Энергетические характеристики зажигания и кинетика свечения пламен дисперсных частиц углей различных стадий метаморфизма при воздействии лазерных импульсов
Химия в интересах устойчивого развития. 2020. Т.28. №6. С.535-543. DOI: 10.15372/KhUR2020260 РИНЦ AN OpenAlex
Энергетические характеристики зажигания и кинетика свечения пламен дисперсных частиц углей различных стадий метаморфизма при воздействии лазерных импульсов
Химия в интересах устойчивого развития. 2020. Т.28. №6. С.535-543. DOI: 10.15372/KhUR2020260 РИНЦ AN OpenAlex
Dates:
| Published print: | Nov 1, 2020 |
Identifiers:
| Web of science: | WOS:000624318200001 |
| Elibrary: | 44771958 |
| OpenAlex: | W4236929369 |