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本文是在实际工程水工模型试验的基础上,参考国内外一些研究成果加以综合分析写成的。文中根据水工设计中经常遇到的矩形扩散水跃计算问题,搜集目前见到的一些计算方法,并以模型试验结果为依据,进行了计算比较和简要评述。在此基础上还提出了以1/2次抛物线为水跃轮廓的扩散水跃计算公式,其与模型实测数据尚称符合,可供设计计算之参考。为了便于应用,文中还列举了具体算例。
This article is based on the actual engineering hydraulic model test, with reference to a number of domestic and foreign research results to be integrated analysis written. According to the calculation problem of rectangular diffusive jump frequently encountered in hydraulic design, some computational methods found at present are collected. Based on the results of model test, the comparisons and brief comments are made. On this basis, the calculation formula of diffusion jerk with 1/2 parabola as the hydrodynamic profile is also proposed, which is still in conformity with the measured data of the model and can be used as a reference for design calculation. In order to facilitate the application, the article also lists specific examples.