The effect of coal-water slurries spraying method on the characteristics of gas-droplet jets; International Communications in Heat and Mass Transfer; Vol. 172, pt. 4
| Parent link: | International Communications in Heat and Mass Transfer.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 172, pt. 4.— 2026.— Article number 110546, 10 p. |
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| Zusammenfassung: | Title screen Results are presented from experimental studies on the influence of coal-water slurry spraying methods and nozzle geometry on the characteristics of gas-droplet jets. A comparative analysis is performed for the first time on the efficacy of using coal-water slurry nozzles with internal, external, and combined mixing of the coal-water slurry and the atomizing agent, along with several variants of nozzle channel cross-sectional geometries. Accounting for the broad spectrum of properties of prospective coal-water fuels and their influence on spraying characteristics, two types of coal-water slurry with substantially differing viscosity and fluidity were used in the study. As a third component, a dispersing additive – nanodispersed carbon black – was introduced into the slurry in the amount of 2% by mass. The difference in viscosity between the slurries was 54%. It was proven that when spraying slurries using a nozzle with internal mixing, the average droplet size in the jet registration area ranges from 69.5 to 145.3 μm. For a nozzle with external mixing of the slurry and atomizing agent, the average droplet size varies from 111.2 to 144.3 μm. With the combined spraying method, the average droplet size ranges from 91.1 to 123.6 μm. The significant influence of the geometric cross-section of the nozzle channel on the characteristics of the gas-droplet jet is demonstrated for the first time. It was established that the cross-shaped and three-petal forms of nozzle channels exert a substantial influence on the dispersity of the gas-droplet jet. Their use results in an average slurry droplet size that is 17% larger compared to nozzles with round, oval, and rectangular cross-sections. Studies of the spraying velocity of coal-water slurries showed minimal influence of the spraying method and nozzle type. On average, for the three studied spraying methods, two slurry compositions, and six nozzles of different geometries, the velocity of the majority of identified droplets is from 28 to 38 m/s. The spray angle of the gas-droplet jets varies from 27° to 29°, which is typical for all three studied spraying methods of coal-water slurry Текстовый файл AM_Agreement |
| Sprache: | Englisch |
| Veröffentlicht: |
2026
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| Schlagworte: | |
| Online-Zugang: | https://doi.org/10.1016/j.icheatmasstransfer.2026.110546 |
| Format: | Elektronisch Buchkapitel |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684382 |
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| 200 | 1 | |a The effect of coal-water slurries spraying method on the characteristics of gas-droplet jets |f D. V. Gvozdyakov, A. V. Zenkov | |
| 203 | |a Текст |b визуальный |c электронный | ||
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| 300 | |a Title screen | ||
| 320 | |a References: 59 tit | ||
| 330 | |a Results are presented from experimental studies on the influence of coal-water slurry spraying methods and nozzle geometry on the characteristics of gas-droplet jets. A comparative analysis is performed for the first time on the efficacy of using coal-water slurry nozzles with internal, external, and combined mixing of the coal-water slurry and the atomizing agent, along with several variants of nozzle channel cross-sectional geometries. Accounting for the broad spectrum of properties of prospective coal-water fuels and their influence on spraying characteristics, two types of coal-water slurry with substantially differing viscosity and fluidity were used in the study. As a third component, a dispersing additive – nanodispersed carbon black – was introduced into the slurry in the amount of 2% by mass. The difference in viscosity between the slurries was 54%. It was proven that when spraying slurries using a nozzle with internal mixing, the average droplet size in the jet registration area ranges from 69.5 to 145.3 μm. For a nozzle with external mixing of the slurry and atomizing agent, the average droplet size varies from 111.2 to 144.3 μm. With the combined spraying method, the average droplet size ranges from 91.1 to 123.6 μm. The significant influence of the geometric cross-section of the nozzle channel on the characteristics of the gas-droplet jet is demonstrated for the first time. It was established that the cross-shaped and three-petal forms of nozzle channels exert a substantial influence on the dispersity of the gas-droplet jet. Their use results in an average slurry droplet size that is 17% larger compared to nozzles with round, oval, and rectangular cross-sections. Studies of the spraying velocity of coal-water slurries showed minimal influence of the spraying method and nozzle type. On average, for the three studied spraying methods, two slurry compositions, and six nozzles of different geometries, the velocity of the majority of identified droplets is from 28 to 38 m/s. The spray angle of the gas-droplet jets varies from 27° to 29°, which is typical for all three studied spraying methods of coal-water slurry | ||
| 336 | |a Текстовый файл | ||
| 371 | 0 | |a AM_Agreement | |
| 461 | 1 | |t International Communications in Heat and Mass Transfer |c Amsterdam |n Elsevier Science Publishing Company Inc. | |
| 463 | 1 | |t Vol. 172, pt. 4 |v Article number 110546, 10 p. |d 2026 | |
| 610 | 1 | |a Coal-water slurry | |
| 610 | 1 | |a Nozzle | |
| 610 | 1 | |a Spraying | |
| 610 | 1 | |a Gas-droplet jet | |
| 610 | 1 | |a Average droplet size | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 700 | 1 | |a Gvozdyakov |b D. V. |c specialist in the field of power engineering |c Associate Professor of Tomsk Polytechnic University, Candidate of technical sciences |f 1985- |g Dmitry Vasilievich |9 18396 | |
| 701 | 1 | |a Zenkov |b A. V. |c Associate Professor of Tomsk Polytechnic University, Candidate of Technical Sciences |c specialist in the field of power engineering |f 1992- |g Andrey Viktorovich |9 20530 | |
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