Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization
Results of experimental studies of pneumomechanical atomization process of slurry fuel with a plasticizer in an aerodynamic simulator of power boiler furnace are presented. Analysis of the current state in the field of research of slurry fuel atomization processes has been conducted. Influence of pr...
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| Format: | Article |
| Language: | English |
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Kazan State Power Engineering University
2019-12-01
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| Series: | Известия высших учебных заведений: Проблемы энергетики |
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| Online Access: | https://www.energyret.ru/jour/article/view/1110 |
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| author | D. V. Gvozdyakov A. V. Zenkov V. E. Gubin M. V. Vedyashkin |
| author_facet | D. V. Gvozdyakov A. V. Zenkov V. E. Gubin M. V. Vedyashkin |
| author_sort | D. V. Gvozdyakov |
| collection | DOAJ |
| description | Results of experimental studies of pneumomechanical atomization process of slurry fuel with a plasticizer in an aerodynamic simulator of power boiler furnace are presented. Analysis of the current state in the field of research of slurry fuel atomization processes has been conducted. Influence of pressure of slurry fuel and air on the structure of the emerging spray cone have been analyzed. The values of characteristic dimensions of three zones of spray cone have been determined: core, middle and outer zones. Effect of pressure of the sprayed slurry fuel and air on the period of stable spray cone formation and geometric characteristics of the zones has been experimentally confirmed. Ranges of velocities and sizes of droplets in the flow at various pressures have been distinguished. The quantitative values of slurry fuel droplets with different velocities in the process of its pneumatic spraying have been obtained. It has been established that the largest number of particles in the study area have velocities up to 8 m/s; a significant number of droplets (up to 20%) have velocities from 8 to 32 m/s; velocities of 32 m/s and more are typical for 1% of droplets. During the results processing, aerosol particles with a size of 1 micron or less have not been taken into account. The values of We criterion for the respective sizes and velocities of the sprayed fuel droplets have been determined. It has been established that significant part of the droplets undergoes catastrophic crushing, which is characteristic for the values of We numbers from 7800 and higher. The obtained results can be used for mathematical and physical modeling of the process of slurry fuels atomization in the furnaces of power boilers in order to predict the aerodynamic characteristics of the designed and existing units. |
| first_indexed | 2024-03-12T18:29:53Z |
| format | Article |
| id | doaj.art-4c390c7a19bf4134a012a5a8aaa4e189 |
| institution | Directory Open Access Journal |
| issn | 1998-9903 |
| language | English |
| last_indexed | 2025-02-18T02:03:10Z |
| publishDate | 2019-12-01 |
| publisher | Kazan State Power Engineering University |
| record_format | Article |
| series | Известия высших учебных заведений: Проблемы энергетики |
| spelling | doaj.art-4c390c7a19bf4134a012a5a8aaa4e1892024-11-26T11:39:39ZengKazan State Power Engineering UniversityИзвестия высших учебных заведений: Проблемы энергетики1998-99032019-12-0121511012310.30724/1998-9903-2019-21-5-110-123624Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomizationD. V. Gvozdyakov0A. V. Zenkov1V. E. Gubin2M. V. Vedyashkin3National Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityResults of experimental studies of pneumomechanical atomization process of slurry fuel with a plasticizer in an aerodynamic simulator of power boiler furnace are presented. Analysis of the current state in the field of research of slurry fuel atomization processes has been conducted. Influence of pressure of slurry fuel and air on the structure of the emerging spray cone have been analyzed. The values of characteristic dimensions of three zones of spray cone have been determined: core, middle and outer zones. Effect of pressure of the sprayed slurry fuel and air on the period of stable spray cone formation and geometric characteristics of the zones has been experimentally confirmed. Ranges of velocities and sizes of droplets in the flow at various pressures have been distinguished. The quantitative values of slurry fuel droplets with different velocities in the process of its pneumatic spraying have been obtained. It has been established that the largest number of particles in the study area have velocities up to 8 m/s; a significant number of droplets (up to 20%) have velocities from 8 to 32 m/s; velocities of 32 m/s and more are typical for 1% of droplets. During the results processing, aerosol particles with a size of 1 micron or less have not been taken into account. The values of We criterion for the respective sizes and velocities of the sprayed fuel droplets have been determined. It has been established that significant part of the droplets undergoes catastrophic crushing, which is characteristic for the values of We numbers from 7800 and higher. The obtained results can be used for mathematical and physical modeling of the process of slurry fuels atomization in the furnaces of power boilers in order to predict the aerodynamic characteristics of the designed and existing units.https://www.energyret.ru/jour/article/view/1110slurry fuelatomizationcoal-water fuelweber numberspray cone. |
| spellingShingle | D. V. Gvozdyakov A. V. Zenkov V. E. Gubin M. V. Vedyashkin Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization Известия высших учебных заведений: Проблемы энергетики slurry fuel atomization coal-water fuel weber number spray cone. |
| title | Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization |
| title_full | Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization |
| title_fullStr | Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization |
| title_full_unstemmed | Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization |
| title_short | Experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization |
| title_sort | experimental studies of the influence of pressure of slurry fuel and air on the spray cone structure during atomization |
| topic | slurry fuel atomization coal-water fuel weber number spray cone. |
| url | https://www.energyret.ru/jour/article/view/1110 |
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