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陈 玉, 张 洋, 欧邦虎, 王 煜.导叶关闭规律对水电站流道压力分布特性影响水资源与水工程学报[J].,2019,30(6):135-143
导叶关闭规律对水电站流道压力分布特性影响
Effect of guide vane closure pattern on pressure distributing characteristics of hydropower station flow passage
  
DOI:10.11705/j.issn.1672-643X.2019.06.21
中文关键词:  坝后式水电站过渡过程  CFD三维流体计算  导叶关闭规律  压力空间分布  压力特性差异分析法
英文关键词:transient of hydropower station at dam toe  CFD three-dimensional fluid calculation  guide vane closure law  pressure spatial distribution  analysis on pressure distributing characteristics difference
基金项目:国家自然科学基金项目(51409151)
作者单位
陈 玉1, 张 洋2, 欧邦虎3, 王 煜1 (1. 三峡大学 水利与环境学院 湖北 宜昌 443002 2. 宜昌市水利水电勘察设计院有限公司湖北 宜昌 443002 3.蒙江水力发电总厂 贵州 都匀 558000) 
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中文摘要:
      水电站过渡过程中,不同导叶关闭规律对流道压力值及分布特性有较大影响,特别对引水道短、断面尺寸大的坝后式水电站,可能造成同一断面的压力不均问题,危及水电站的安全。为探求不同导叶关闭规律对坝后式水电站流道压力空间分布特性的影响,以典型坝后式水电站三峡右岸水电站为研究对象,通过水电站过渡过程全流道压力特性三维数值模拟及自定义的压力特性差异分析法,对比不同导叶关闭规律下的水电站流道典型断面压力空间分布差异。结果表明:采用三段导叶关闭规律更能限制转轮最大转速,而采用两段导叶关闭规律使得流道同一断面的压力分布更为均匀,从而对流道有利,能保证水电站的安全稳定运行。
英文摘要:
      Different guide vane closure ways have great influence on pressure value and pressure distributing characteristics of the flow passage during the transient process of the hydropower station, especially for hydropower stations at dam toe with short penstock and large cross section, which may cause the uneven distribution of pressure on the same cross section and is harmful for the safety of hydropower station. To explore the effect of different guide vane closure laws on pressure spatial distributing characteristics of hydropower station at dam toe flow passage, this paper takes the Three Gorges Right Bank Hydropower Station, a typical hydropower station at dam toe, as the researching object, and uses three-dimensional numerical simulation along with self-defined Analysis on Pressure Distributing Characteristics Difference, to compare and study pressure spatial distributing characteristics within different guide vane closure law. The results showed that the maximum rotating speed will get restriction when applying three-stage guide vane closure law. The pressure distribution at the same cross section will be more even when applying two-stage guide vane law, which will beneficial to the flow passage and ensure the steady and safe operation of the hydropower station.
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