Reconstruction of Flow Formula for Elliptical-Straight Flow Measurement Flumes Based on Flow Coefficient
QI Yubin
ZHANG Yueyun
LIU Mingyu
Abstract：The elliptical-straight flow measurement flume is a new type of U-shaped channel flow measurement device.Its flow formula exhibits significant measurement errors at high contraction ratios.To optimize the original flow formula,data from four types of U-shaped channels with three contraction ratios were analyzed.Based on the fundamental formula for weir flow calculation,dimensional analysis and regression analysis were used to determine the flow coefficient.A new flow formula was reconstructed based on this flow coefficient.The results show that,compared with the original formula,the reconstructed flow formula improves measurement accuracy,reducing the average relative error from 2.19%to 1.95%,with 97.9%of the absolute values of relative errors being less than 5%.This study provides a new approach for constructing flow formulas for flow measurement flumes.
Keywords：elliptical-straight flow measurement flumeflow formulaflow coefficientdimensional analysis
Publication Date：2025-11-20
Online Publishing Date：2025-12-15(First online date of this platform, not the publication date of the document)
Pages：4( 87-90 )