许家崖水库溢洪道消能防冲方案模型试验研究
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摘要
许家崖水库溢洪道中的水流为低弗劳德数水流,消能不充分是这类工程布置中的普遍问题。此外,溢洪道进口后方的弯道一定程度上恶化了溢洪道中的流态。为了得出更为合理的布置及消能防冲方案,通过模型试验的方法,从底流消能和挑流消能两个方面,分别对原设计方案进行优化,在各种优化方案的基础上对比了单级消力池消能方式、两级消力池消能方式和挑流消能方式之间的水流流态和消能效果,最终推荐挑流消能方式为工程较为经济合理的消能形式。
Flow on the Xujiaya spillway is featured with a low Froude number and inadequate energy dissipation that is a common problem in similar projects. Another factor that worsens the flow condition to a certain extent is the bend downstream the spillway inlet. To find a reasonable energy dissipation scheme, a model spillway was experimentally tested to modify the original design and optimize its energy dissipation effects. Three types of schemes were compared: single-stage stilling basin, two-stage stilling basin, and trajectory bucket. The effects of energy dissipation and flow regimes in each scheme were optimized through testing and examining different design alternatives, and the trajectory bucket design was finalized as the economic and reasonable energy dissipation scheme for this reservoir spillway.
Flow on the Xujiaya spillway is featured with a low Froude number and inadequate energy dissipation that is a common problem in similar projects. Another factor that worsens the flow condition to a certain extent is the bend downstream the spillway inlet. To find a reasonable energy dissipation scheme, a model spillway was experimentally tested to modify the original design and optimize its energy dissipation effects. Three types of schemes were compared: single-stage stilling basin, two-stage stilling basin, and trajectory bucket. The effects of energy dissipation and flow regimes in each scheme were optimized through testing and examining different design alternatives, and the trajectory bucket design was finalized as the economic and reasonable energy dissipation scheme for this reservoir spillway.
引文
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[4]王圣文,吴洪亮.多级连续消力池的布置及水力计算方法[J].水利与建筑工程学报,2011,9(5):105-107.WANG Shengwen,WU Hongliang.Layout program and hydraulic calculation method of multi-stage continuous stilling basins[J].Journal of Water Resources and Architectural Engineering,2011,9(5):105-107.(in Chinese)
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[2]许光祥,崔予达,等.复式消力池在山区小水电中的应用研究[J].水力发电学报,2007,26(2):88-92.XU Guangxiang,CUI Yuda,et al.Study on application of compound still basin in small hydropower plants in mountainous area[J].Journal of Hydroelectric Engineering,2007,26(2):88-92.(in Chinese)
[3]中华人民共和国水利部.《水工(常规)模型试验规程SL155-2012》[S].北京:中国水利水电出版社,2012.The Ministry of Water Resources of the People’s Republic of China.Specification for normal hydraulic model SL155-2012[S].Beijing:China Water Power Press,2012.(in Chinese)
[4]王圣文,吴洪亮.多级连续消力池的布置及水力计算方法[J].水利与建筑工程学报,2011,9(5):105-107.WANG Shengwen,WU Hongliang.Layout program and hydraulic calculation method of multi-stage continuous stilling basins[J].Journal of Water Resources and Architectural Engineering,2011,9(5):105-107.(in Chinese)
[5]黄智敏,何小惠,等.阳江抽水蓄能电站下库溢洪道消能研究[J].水力发电学报,2007,26(5):92-96.HUANG Zhimin,HE Xiaohui,et al.Research on energy dissipation of downstream reservoir spillway of Yangjiang pumped storage plant[J].Journal of Hydroelectric Engineering,2007,26(5):92-96.(in Chinese)
[6]刘沛清.现代坝工消能防冲原理[M].北京:科学出版社,2010.LIU Peiqing.Principles of energy dissipation and anti-erosion in modern dam[M].Beijing:Science Press,2010.(in Chinese)
[7]邹鹏飞,王均星,等.挑流消能冲坑内基岩体的动力分析研究[J].水力发电学报,2007,26(4):71-75.ZOU Pengfei,WANG Junxing,et al.Research on dynamic characteristics of original rock in the scour pit of energy dissipation of ski-jump[J].Journal of Hydroelectric Engineering,2007,26(4):71-75.(in Chinese)