标准U型明渠均匀流断面平均流速计算研究

Study on mean flow velocity in standard U-shaped open channel uniform flow

灌区的渠道常为宽深比小于10的窄深式渠道,侧壁是影响流速的重要因素。文章综合考虑侧壁对均匀流速的影响,对标准U型明渠均匀流断面平均流速公式进行了推导和试验验证。结果显示,考虑侧壁影响的流速分布公式具有较高的精度,且公式形式简单,具有显著的实用价值。

The channel of irrigation area is generally narrow and deep channel whose width depth ratio is usually less than 10, so the mean flow velocity is affected by side wall. In the paper, the mean flow velocity formula of standard U-shaped open channel uniform flow was deduced and tested by experiment, but the influence of side wall was considered. The conclusion is shown that the calculation formula of mean flow velocity is not only high precision but simple, which has significantly practical value.