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| DOI：10.13522/j.cnki.ggps.20190100 |
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| Experimental Study and Numerical Simulation of Wing Pillar-shaped Measuring Flume in Trapezoidal Channel |
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LIU Hongtao, YU Mingzhou, NIU Yan, SONG Yimeng, ZHAO Ruijuan,HAN Yu, QU Zhongyi
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1. College of Water and Environmental Engineering, Changchun Institute of Technology, Changchun 130012, China; 2.Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China;3.Laboratory of Applied Disaster Prevention in Water Conservation Engineering of Jilin Province, Changchun 130012, China;4. Changchun Water Resources Survey and Design Institute, Changchun 130012, China; 5. Songliao Water Resources Commission, Changchun 130012, China; 6.College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China
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| Abstract: |
| 【Objective】The purpose of this study is to explore the applicability of wing pillar-shaped measuring flume in trapezoidal channel. 【Method】Hydraulic performance model tests were carried out in trapezoidal channels through four different flume shrinkage ratios, and two of them were numerically simulated. Through the analysis of upstream water level, flow and shrinkage ratio, the flow formula was fitted. The accuracy of flow measurement, upstream Froude number, critical submergence and head loss were also analyzed. 【Result】The Hydrometric performance of the wing pillar-shaped measuring flume in trapezoidal channel was great, and the correlation between water level and flow rate was excellent. The square of the correlation coefficient was more than 0.997 1. The fitting flow formula was simple and easy to use. The average error of flow measurement was 2.41%, the Froude number in upstream was less than 0.4, and the critical submergence degree was more than 0.85. The numerical simulation errors of surface line and flow in measuring flume were 3.80% and 3.72% respectively which showed that the simulation results were accurate and reliable.【Conclusion】The performance of the wing pillar-shaped measuring flume meets the relevant technical requirements of the open channel flow measurement specification and can be used for water measurement in trapezoidal channels. The results showed that Fluent 17.1 was reliable and feasible for numerical simulation of wing pillar-shaped measuring flume. |
| Key words: wing pillar-shaped measuring flume; trapezoidal channel; flow formula; numerical simulation |
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