High-speed contactless measurements of temperature evolution during ignition and combustion of coal-based fuel pellets; International Journal of Heat and Mass Transfer; Vol. 175
| Parent link: | International Journal of Heat and Mass Transfer Vol. 175.— 2021.— [121359, 12 p.] |
|---|---|
| Príomhchruthaitheoir: | |
| Údar corparáideach: | |
| Rannpháirtithe: | , |
| Achoimre: | Title screen The temperature evolution of coal pellets, ignited and burned in an initially motionless high-temperature air medium, was analyzed. The fuel pellet surface temperature was recorded using contactless two-color pyrometry with a time increment of 2 ms by means of a high-speed color video camera and an original video frame processing algorithm developed in Wolfram Mathematica. The obtained results made it possible to explore the patterns and characteristics of coal ignition, considering the detected contribution that the gas-phase combustion of released volatiles makes to the pellet heating. The effect of the heating source temperature on the intensity of the fuel surface temperature evolution during the induction period was shown. When the fuel was heated to temperatures above 1073 K, local extrema were identified on the corresponding temperature trend. These characterize the emergence of hot spots – the sites of volatile ignition, preceding the heterogeneous ignition of the solid carbonaceous residue forming as a result of the thermal decomposition of the near-surface layer of the fuel pellet. The time intervals between consecutive local flashes of volatiles in their series from the first recorded occurrence to the last one, corresponding to the moment of the fuel's heterogeneous ignition, reduce five- to sixfold. The uniformity of temperature distribution over the surface of the fuel pellet at the moment of its heterogeneous ignition allows us to determine the moment when the gas-phase spot ignition of volatiles changes to the heterogeneous combustion of the solid carbonaceous residue at heating source temperatures over 1100 K. Режим доступа: по договору с организацией-держателем ресурса |
| Teanga: | Béarla |
| Foilsithe / Cruthaithe: |
2021
|
| Ábhair: | |
| Rochtain ar líne: | https://doi.org/10.1016/j.ijheatmasstransfer.2021.121359 |
| Formáid: | Leictreonach Caibidil leabhair |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664833 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 664833 | ||
| 005 | 20250122162051.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\36018 | ||
| 090 | |a 664833 | ||
| 100 | |a 20210521d2021 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 102 | |a NL | ||
| 135 | |a drcn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a High-speed contactless measurements of temperature evolution during ignition and combustion of coal-based fuel pellets |f D. O. Glushkov, R. I. Egorov, D. M. Klepikov | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 37 tit.] | ||
| 330 | |a The temperature evolution of coal pellets, ignited and burned in an initially motionless high-temperature air medium, was analyzed. The fuel pellet surface temperature was recorded using contactless two-color pyrometry with a time increment of 2 ms by means of a high-speed color video camera and an original video frame processing algorithm developed in Wolfram Mathematica. The obtained results made it possible to explore the patterns and characteristics of coal ignition, considering the detected contribution that the gas-phase combustion of released volatiles makes to the pellet heating. The effect of the heating source temperature on the intensity of the fuel surface temperature evolution during the induction period was shown. When the fuel was heated to temperatures above 1073 K, local extrema were identified on the corresponding temperature trend. These characterize the emergence of hot spots – the sites of volatile ignition, preceding the heterogeneous ignition of the solid carbonaceous residue forming as a result of the thermal decomposition of the near-surface layer of the fuel pellet. The time intervals between consecutive local flashes of volatiles in their series from the first recorded occurrence to the last one, corresponding to the moment of the fuel's heterogeneous ignition, reduce five- to sixfold. The uniformity of temperature distribution over the surface of the fuel pellet at the moment of its heterogeneous ignition allows us to determine the moment when the gas-phase spot ignition of volatiles changes to the heterogeneous combustion of the solid carbonaceous residue at heating source temperatures over 1100 K. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t International Journal of Heat and Mass Transfer | ||
| 463 | |t Vol. 175 |v [121359, 12 p.] |d 2021 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a coal-based fuel | |
| 610 | 1 | |a fuel pellet | |
| 610 | 1 | |a combustion mechanism | |
| 610 | 1 | |a two-color pyrometry | |
| 610 | 1 | |a temperature trend and field | |
| 610 | 1 | |a ignition delay time | |
| 610 | 1 | |a угольные топлива | |
| 610 | 1 | |a горение | |
| 610 | 1 | |a пирометрия | |
| 610 | 1 | |a зажигание | |
| 700 | 1 | |a Glushkov |b D. O. |c specialist in the field of power engineering |c Professor, Director of the ISHFVP of the Tomsk Polytechnic University, Doctor of Technical Sciences |f 1988- |g Dmitry Olegovich |3 (RuTPU)RU\TPU\pers\32471 |9 16419 | |
| 701 | 1 | |a Egorov |b R. I. |c specialist in the field of heat and power engineering |c Researcher of Tomsk Polytechnic University, candidate of physical and mathematical sciences |f 1980- |g Roman Igorevich |3 (RuTPU)RU\TPU\pers\36601 |9 19642 | |
| 701 | 1 | |a Klepikov |b D. M. |g Dmitry Mikhaylovich | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Исследовательская школа физики высокоэнергетических процессов |c (2017- ) |3 (RuTPU)RU\TPU\col\23551 |
| 801 | 2 | |a RU |b 63413507 |c 20210521 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1016/j.ijheatmasstransfer.2021.121359 | |
| 942 | |c CF | ||