Influence of the velocity gradient of the carrier medium on the crushing characteristics of non-Newtonian liquid droplets on the example of a highly concentrated coal-water suspension
| Parent link: | Experimental Thermal and Fluid Science.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 171.— 2026.— Article number 111598, 16 p. |
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| Other Authors: | , , , , , , , |
| Summary: | Title screen The article presents the results of the experimental studies of the processes of fragmentation of coal-water slurry fuel (CWS) drops in an air flow. The directions of movement of the CWS drops and the air flow coincided. The effect of the velocity gradient () of the carrier medium (air) on the characteristics and conditions of CWS drop fragmentation was analyzed based on the experimental results. It was found that the values have a significant effect on the characteristics and conditions of CWS drop fragmentation. An increase in the velocity gradient of the carrier gas medium leads to a significantly nonlinear and nonmonotonic change in the critical Weber numbers for CWS drops of typical sizes in the case of using highly concentrated suspensions (with a coal component concentration in the fuel of φcoal = 50–55 %). The analysis of the effect of the coal type and its concentration in the water-coal suspension has shown that the characteristics and conditions of CWS drop fragmentation are significantly affected by the rheological properties of the water-coal fuel. It is shown that during fragmentation of drops of highly concentrated suspensions (at φcoal = 50–55 %) the dependence of the critical Weber number on the velocity gradient of the carrier medium flow demonstrates significant non-monotonicity and non-linearity. With an increase in the velocity gradient from s−1 to s−1 the values of the critical Weber number decrease (by 20 %), while a further increase in the velocity gradient leads to an increase in the Wecry values by 40 %. The latter is due to a significantly non-linear relationship between the rheological characteristics of the CWS and the concentration of coal, as well as the degree of its metamorphism. The hypothesis describing this non-trivial result has been developed. The hypothesis has been substantiated that the nature of the process of fragmentation of typical CWS drops is greatly influenced by a complex of hydrodynamic processes occurring Текстовый файл AM_Agreement |
| Language: | English |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.expthermflusci.2025.111598 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684470 |