| 董志勇,张旭,朱芳,李晓鹏.针状突体空化结构的高速摄影观察[J].水利学报,2009,40(11): |
| 针状突体空化结构的高速摄影观察 |
| High speed photographic observations of cavitation structures behind a needle_like protrusion |
| |
| DOI： |
| 中文关键词: 针状突体 空化结构 高速摄影技术 掺气 |
| 英文关键词: needle like protrusion cavitation structures high speed photography aeration |
| 基金项目: |
|
| 摘要点击次数: 2750 |
| 全文下载次数: 467 |
| 中文摘要: |
| 应用高速摄影技术在直流式水洞中对针状突体的空化结构进行了试验研究。试验流速为8～40m/s，高速摄影机拍摄速率为20000fps，曝光时间为4μs。观察了不同流速下针状突体后空化云的形态以及随流动的演变情况，及不同掺气量对空化云的影响。此外，还给出针状突体空化区包络线（自由流线）的表达式。 |
| 英文摘要: |
| Cavitation structures behind a needle like protrusion were preliminarily investigated by high speed photography in a water tunnel. Flow velocity 8～40m/s,frame rate 20000fps and exposure duration 4μs were taken in the experiment. Patterns of cavitation clouds behind the needle like protrusion and their variations with flow were observed under different flow velocities. The effect of different air flow rates on cavitation clouds were considered. In addition, an expression of enveloping curve (free streamline) due to cavitation behind a needle like protrusion was obtained. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |