长江科学院院报 ›› 2013, Vol. 30 ›› Issue (8): 79-83.DOI: 10.3969/j.issn.1001-5485.2013.08.0;2013,30(08)

• 调水工程水力学 • 上一篇    下一篇

调水工程输水渠道堰闸流量计算方法探讨

侯冬梅,王才欢,刘毅   

  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:侯冬梅(1979-),女,湖南衡阳人,工程师,硕士,主要从事水工水力学研究,(电话)13871278229(电子信箱)hhddmm6147@chinaren.com。

Discussion on the Calculation Formula of Discharge Flow at Weir Sluicein Water Transfer Project

HOU Dong-mei, WANG Cai-huan, LIU Yi   

  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: 调水工程输水渠道堰闸流量计算方法的准确性是运行调度数字化、信息化的关键水力条件。传统的堰闸流量计算方法是先进行孔流、堰流判别,再根据相应的经验公式进行计算,其孔、堰流判断条件为闸门的相对开度e/H。经试验研究及理论分析论证认为:传统计算公式中以e/H=0.65作为宽顶堰孔流与堰流的判断条件,仅适用于自由出流状态。调水工程输水渠道堰闸工程正常运行条件一般为大淹没孔流,传统方法计算流量误差较大。通过系列模型试验数据的拟合,提出了特定条件下调水工程堰闸流量计算方法。

关键词: 流态识别, 孔流堰流转换条件, 淹没系数, 调水工程

Abstract: The accuracy of flow calculation at the weir sluice of water diversion project is a prerequisite for digital operation. Traditional method of calculating discharge flow in hydraulics textbooks in general is to discriminate the flow pattern first, and then to calculate discharge according to corresponding empirical formulas. The discrimination of flow conversion conditions is determined by the relative opening e/H of gate. In the present research, by experimental and theoretical analysis, it is concluded that e/H=0.65 in the traditional formula as an index of discriminating orifice flow and weir flow is only suitable for free flow condition. It would cause big error in the calculation for long-distance water transfer projects, because it is not suitable for submerged weir flow converting to submerged orifice flow. According to model test data, the fitted formula of calculating the discharge at weir sluice under specific conditions of water transfer project are obtained.

Key words: flow pattern discrimination, condition of the conversion between orifice flow and weir flow, discharge coefficient for submerged flow, water diversion project

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