| 摘要: |
| 在对某水电站放空洞工作闸门的常压及减压模型试验中，进行了工作闸门的体型比较；讨论了通风洞的进气量、明流洞坎下沿程水流的修气浓度、掺气坎减免空蚀的保护长度；还探讨了门槽空化的特性以及工作闸门掺气设施的方案优化。 |
| 关键词: 掺气水流，通气挑坎，修气装置，空化防护 |
| DOI： |
| 分类号:TV663 |
| 基金项目: |
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| Study on aeration devices behind work gate in free flow tunnel |
|
Qian Yingying,Wang Zhengnie
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|
Nanjing Hydraulic Research Institute
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| Abstract: |
| In this paper,combined with the design of free flow tunnel of a certain hydropower station, a kind of U-shape abrupt offset aeration device for preventing cavitation were studied in common and subatmospheric hydraulic models. Characteristics of such aeration device, including the amount of aeration in the bottom and side cavities behind it, the air now in air vent and above the water surface in free level tunnel, the air concentration of nowing water along the tunnel floor as well as its corresponding protective range againstcavitation erosion and the optimization of aeration device, were analysed and discussed. |
| Key words: aerated flow, aeration ramp, aeration device, cavitation prevention |
