U形渠道断面流速分布规律试验研究

Research on the Velocity of Flow Index Distributed Rule of U Channel

U形渠道是灌区广泛推广的灌溉渠道,其具有占地面积少、水头损失小等特点。但U形渠道流速分布规律及其流量测量仍处于研究阶段。对灌区计划用水、科学用水和节约水资源等工作造成了很大的影响,因此U形渠道测流技术是亟待解决的问题。本文从试验的角度使用断面测流方法,针对三种不同规格的U形渠道测量断面,运用数学拟合方法,探求其流速分布规律,并分析出了相应的U形渠道过水断面流量的积分求和公式,以求对以后的U形渠道量水工作有所帮助。

U channel is extensively used in irrigated region, but velocity of flow distributing rule and flux measurement for U channel is being on research stage still. It seriously hindered the testing water amount in U channel of irrigated region, collecting the water rate. So, it is a practical problem of production urgently to be solved in vast irrigated region that the U channel examines the technology of flowing. The method of testing flux in the section is adopted from experimental point of view to measure water velocity of cross section for three types of U channel. Then, U channel velocity of flow distributed rule is researched by mathematic simulation method, an integral calculus formula for homologous U channel over water cross section discharge is ascertained.