Abstract
Droplets impact on walls in a rotating gas–liquid flow field is common in industrial applications. To reveal the effect of swirling strength on droplet impact outcome, droplet trajectory and impingements on the concave wall with three kinds of swirlers are investigated by numerical simulation and experiment. Three impact outcomes are observed: downward slide spreading, horizontal slide spreading, and upward slide spreading. It is found that the swirling strength affects the impact outcome and the spreading factors. The transition from the upward slide spreading to other impact outcomes is promoted by increasing the swirling strength. Moreover, a theoretical model is deduced for the maximum transverse spreading factor of the droplets impact on the concave wall in a rotating gas flow field by modifying the surface energy and adding the auxiliary dissipation. The discrepancies between the predicted maximum transverse spreading factors and the experimental results are in the range of + 5 %∼-10 %. © 2025 Elsevier Ltd
| Original language | English |
|---|---|
| Article number | 111282 |
| Journal | Annals of Nuclear Energy |
| Volume | 218 |
| Online published | 24 Mar 2025 |
| DOIs | |
| Publication status | Online published - 24 Mar 2025 |
Funding
This work was financially supported by the National Natural Science Foundations of China (No. 51876127).
Research Keywords
- Droplet impact
- Maximum spreading factor
- Swirler
- Swirling strength