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| Numerical simulation of flow and heat transfer process of double droplets simultaneously impacting on flat liquid film |
| Received:April 20, 2023 Revised:May 20, 2023 |
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| DOI：10.7511/jslx20230420003 |
| KeyWord:double droplets CLSVOF liquid film central jet heat transfer |
| Author | Institution |
| 吴寒旭 |
南京航空航天大学 航空学院, 南京 |
| 朱发兴 |
南京航空航天大学 航空学院, 南京 |
| 赵可 |
滁州学院 生物与食品工程学院, 滁州 |
| 蒋彦龙 |
南京航空航天大学 航空学院, 南京 |
| 董月 |
南京航空航天大学 航空学院, 南京 |
| 黄博阳 |
南京航空航天大学 航空学院, 南京 |
| 罗家琪 |
南京航空航天大学 航空学院, 南京 |
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| Abstract: |
| The study of droplet impact on a liquid film is conducive to foster the performance of airborne spray cooling and boost the application and development of the aviation industry,based on its considerable influence on heat transfer and morphological changes of liquid film.On the premise of different thicknesses of a liquid film,horizontal distances of double droplets and gravity accelerations,the research focuses on the evolution process and characteristics of liquid film morphology,explores the development law of the central jet after the double droplets impact on the liquid film,and analyzes the heat transfer characteristics of the liquid film and the high-temperature wall,with a rollout of simulating the simultaneous impact of double droplets on the liquid film using CLSVOF method.The results show that the thicker the liquid film is,the more slowly the central jet rises,the later the jet breaks,and the liquid film retraction has a significant impact on wall heat transfer.The larger the horizontal distance between the two droplets is,the more slowly the central jet rise,increasing the distance does not change the trend of changes in wall heat flux.And the greater the gravity acceleration is,the more slowly the central jet rises,the earlier the jet breaks,and the effect of gravitational acceleration on wall heat transfer is relatively small. |
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