弧底梯形渠道无喉道量水槽水动力学性能分析

Analysis on Hydrodynamic Performance of Cut-throat Flow Measuring Flume on Trapezoidal Canal with Arc Bottom

通过构建弧底梯形渠道无喉道量水槽模型,对其水动力学性能从临界流水深、壅水高度、临界淹没度以及水头损失变化等角度展开模拟和分析。结果表明:为改善量水槽性能,需要在合理范围内根据实际需要,系统而科学地调节收缩比及坡底,从而在确保输水畅通的同时降低水头损失。

Through building the model of cut-throat measuring flume on trapezoidal canal with arc bottom, simulation and analysis is carried out on its hydrodynamic performance from critical flow depth, backwater height, critical submerged criterion, head loss change, etc. The results show： in order to improve performance of the measuring flume, it is needed to systematically and scientifically adjust the contraction ratio and the base of slope in a reasonable range according to actual needs, so as to ensure unbloeked water delivery and reduced the head loss.