| Autor: |
O. V. Vysokomornaya, M. V. Piskunov, A. O. Oparin, A. P. Vergun |
| Jazyk: |
English<br />Russian |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Известия высших учебных заведений: Проблемы энергетики, Vol 19, Iss 5-6, Pp 41-50 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
1998-9903 |
| DOI: |
10.30724/1998-9903-2017-19-5-6-41-50 |
| Popis: |
The paper reports experimental results on the intensive (fast) cooling of 20 mm steel ball heated to 1000 K when immersing in different coolants in 0.003 m3 glass vessel: tap water, seawater with salt concentration y of about 18 g/l, water solution of NaCl with y~27 g/l. By using the high-speed video recording, we study heat and mass transfer on a surface of the heated ball during the cooling. Experiments allow us to conclude that the film boiling on a surface of the metallic ball is almost excluded when using water solutions of salt as coolants. As a result, a cooling time decreases by 2-4 s as compared to the tap water. In addition, when using water solutions of salt, the temperature balance between steel ball and coolant is reached during a minimum time versus the tap water and seawater. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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