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溢流坝的流量系数难于从模型准确地评定,因为该系数随着模型尺寸的减小而减小。为了确定模型缩尺对计算结果的影响。在印度灌溉研究院(IRI)用不同大小的溢流坝模型进行了试验。推荐了一个从缩尺模型估算原型溢流坝流量系数的方法,并得到一根设计曲线,根据该曲线可由给定的水流雷诺数读出流量系数。
The flow coefficient of the spillway is difficult to accurately estimate from the model because the coefficient decreases as the size of the model decreases. In order to determine the impact of the model scale on the calculation results. Irrigation Research Institute (IRI) in India with different sizes of spillway dam model was tested. A method of estimating the flow coefficient of a prototype spillway from a scale model is recommended and a design curve is derived from which the flow coefficient can be read out of a given water flow Reynolds number.