长江科学院院报 ›› 2013, Vol. 30 ›› Issue (8): 46-49.DOI: 10.3969/j.issn.1001-5485.2013.08.0;2013,30(08)

• 高速水流与泄洪雾化 • 上一篇    下一篇

三峡电站排沙孔工作门区及通气管道空化特性研究

姜伯乐,张晖,杨江宁   

  1. 长江科学院水力学研究所,武汉430010
  • 收稿日期:2013-08-13 修回日期:2013-08-13 出版日期:2013-08-13 发布日期:2013-08-13
  • 作者简介:姜伯乐(1973-),男,山东海阳人,高级工程师,主要从事水工水力学研究,(电话)027-82829902(电子信箱)jiangbl@mail.crsri.cn。
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项项目(CKSF2012027/SL)

Characteristics of Cavitation in Sediment-Release Orifices andAeration Conduits of Three Gorges Hydropower Station

JIANG Bo-le, ZHANG Hui, YANG Jiang-ning   

  1. Hydraulics Department, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2013-08-13 Revised:2013-08-13 Online:2013-08-13 Published:2013-08-13

摘要: 针对三峡电站排沙孔工作门区及通气管道设计体型,通过减压模型试验研究了通气孔分流对高流速有压泄水段空化特性的影响。成果表明:在通气孔节制阀全开时,通气孔底部出口区会产生强烈的蒸汽型空化,而节制阀区无蒸汽型空化发生;在通气孔节制阀半开或全关时,上述两部位的空化强度大大降低,基本上无空蚀破坏的危险性。为保证高流速有压泄水建筑物安全可靠的运行,工程上要避免该部位出现分流设计。

关键词: 水力学, 三峡电站, 排沙孔, 分流, 蒸汽型空化, 气体型空化

Abstract: The characteristics of cavitation caused by high-speed flow in the pressure tunnel of Three Gorges Project (TGP) hydropower station were investigated through vacuum tank experiment to ascertain the design of the sediment-release orifices and aeration conduit (AC) of TGP. The results showed that obvious steam cavitation was found at the bottom of outlet of AC, but no steam cavitation occurred in the area of valves when the valves were fully opened. However, when the valves were half-opened or fully closed, the cavitation intensity decreased remarkably and also there was little cavitation erosion risk around both the above-mentioned components. It’s concluded that diverting flow design should be avoided for the safe operation of high-speed flow and pressure tunnel in hydropower station.

Key words: hydraulics, TGP hydropower station, sediment-release orifice, diverting flow, steam cavitation, gas cavitation

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