| A numerical model for evolution of internal structure of cloud cavitation | |
Du TZ(杜特专) ; Huang CG(黄晨光); Wang YW(王一伟)
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| Source Publication | Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016 |
| 2019 | |
| Conference Name | 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016 |
| Conference Date | April 10, 2016 - April 15, 2016 |
| Conference Place | Honolulu, HI, United states |
| Abstract | Interaction between bubbles in cloud cavitation play an important role in cavitating flows. A numerical model was developed to study the internal structure and collapse of cloud cavitation. The model consists of: (1) an evolution model of bubble number density taking bubble breakup effects into account; (2) a modified cavitation model based on dynamics of bubble cluster; and (3) the multi-phase Reynolds Averaged Navier-Stokes equations (RANS) for background flow. The evolution model of bubble number density is governed by a transport type equation and the expression of source term is derived from a bubble breakup model. The condensation rate is constructed through dimension analysis and direct simulation of collapse of bubble cluster. The proposed model was tested by flows over a projectile. The results show that the evolution of internal structure of the cloud cavitation is closely related to the development of re-entrant jet. Moreover, the performance of proposed model and the effects of bubble number density on cavitating flows are discussed. © Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016. All rights reserved. |
| Keyword | Bubble break up Bubble clusters Bubble number densities Cloud cavitations Condensation rates Dimension analysis Evolution modeling Reynolds Averaged Navier Stokes Equations |
| Indexed By | EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/80466 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | Institute of Mechanics, Chinese Academy of Sciences, Beijing; 100190, China |
| Recommended Citation GB/T 7714 | Du TZ,Huang CG,Wang YW. A numerical model for evolution of internal structure of cloud cavitation[C]Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016,2019. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| CP2019042.pdf（1471KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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