| A new type of cavitation damage triggered by boundary-layer turbulent production | |
| Li, S. C. ; Liu, S. H. ; Wu, Y. L. | |
| 2010-05-11 ; 2010-05-11 | |
| 关键词 | cavitation damage cavitation inception turbulent production K-mode instability similarity laws scale effect sensitization bluing Physics, Applied Physics, Condensed Matter Physics, Mathematical |
| 中文摘要 | A new type of cavitation damage has been observed on the turbines installed at the Three Gorges Power Station despite no cavitation detected during model tests. Metallurgical and fluid dynamic analysis suggests that this cavitation is triggered by boundary-layer turbulent production; the damaged (roughened) spot in turn triggers subsequent cavitation (damage) immediately down stream. This forms a sustainable dynamic process, resulting in long and equal-width streamwise damage-strips with spanwise regularity reflecting the spanwise stochastic characteristics of turbulent production. Owing to the heat effect of cavitation, intergranular corrosion takes place through sensitization process, leaving the damaged surface with a corrosion appearance. Also, bluing presents at the damaged tails, owing to the nature of low-intensity damage. Extremely large turbines are much more susceptible to this type of cavitation (damage) owing to the similarity laws currently employed for turbine development not concerning the freestream turbulence and the boundary-layer dynamics. |
| 语种 | 英语 ; 英语 |
| 出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD ; SINGAPORE ; 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/27378]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Li, S. C.,Liu, S. H.,Wu, Y. L.. A new type of cavitation damage triggered by boundary-layer turbulent production[J],2010, 2010. |
| APA | Li, S. C.,Liu, S. H.,&Wu, Y. L..(2010).A new type of cavitation damage triggered by boundary-layer turbulent production.. |
| MLA | Li, S. C.,et al."A new type of cavitation damage triggered by boundary-layer turbulent production".(2010). |
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