| ON NECESSITY OF PLACING AN AERATOR IN THE BOTTOM DISCHARGE TUNNEL AT THE LONGTAN HYDROPOWER STATION |
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| 作者姓名： | WU Jian-hua WU Wei-wei RUAN Shi-ping |
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| 作者单位： | WU Jian-hua，WU Wei-wei，RUAN Shi-ping College of Water Conservancy and Hydropower Engineering，Hohai University，Nanjing 210098，China |
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| 摘 要： | 1. INTRODUCTION It is well known that the discharge tunnels under the high velocity flows may be subjected to cavitation damage even when the surface is significantly smooth and the water flow is apparently uniform 1,2]. Discharge bottom aeration has bec…
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| 关 键 词： | 龙滩水电站 底部泄水道 掺气坎 气蚀 |
| 收稿时间： | 2006-05-10 |
On necessity of placing an aerator in the bottom discharge tunnel at the Longtan Hydropower Station |
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| WU Jian-hua WU Wei-wei RUAN Shi-ping.ON NECESSITY OF PLACING AN AERATOR IN THE BOTTOM DISCHARGE TUNNEL AT THE LONGTAN HYDROPOWER STATION[J].Journal of Hydrodynamics,2006,18(6):698-701. |
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| Authors: | Jian-hua Wei-wei WU Shi-ping RUAN |
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| Affiliation: | aCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The air entrainment for avoiding cavitation damage has been widely used in long free flow tunnels. It is crucial to determine whether an aerator is needed for shorter tunnels. In this article, the bottom discharge tunnel at the Longtan Hydropower Station was involved, for which the free flow tunnel section was only 50.00 m long. The cavitation in the tunnel with and without the aerator was investigated using the physical models of the scale 1/30, through the measurements of cavitation noise. The experimental results show that it is necessary to place the aerator at the inlet of the free flow section for higher reservoir level to protect this tunnel from cavitation damage. |
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| Keywords: | aerator bottom discharge tunnel cavitation damage cavitation noise Longtan Hydropower Station |
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