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| DOI：10.13522/j.cnki.ggps.2021428 |
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| Bionic Optimization of Wing-shaped Flume for Rectangular Channel Based on Experimental Study |
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LIU Hongtao, QU Zhongyi, XIANG Dandan
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1. School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. School of Water Conservancy and Environmental Engineering, Changchun Institute of Technology, Changchun 130012, China;
3. Jilin Province Water Engineering Safety and Disaster Prevention Engineering Lab, Changchun 130012, China
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| Abstract: |
| 【Objective】Flume is a device to measure water flow in open channels. The purpose of this paper is to propose a bionic technology to optimize wing-shaped flume in attempts to reduce the head loss across the flume and improve the critical submergence degree for channels in areas with small topographic gradient.【Method】The experiments compared 15 flow conditions. The change in water levels from the inlet to the outlet of the flumes was measured. These enabled us to analyze the hydraulic parameters including water head loss, backwater height, Frude number and critical gradient, and to compare the performance of the original wing-shaped flume and the optimized imitation pigeon wing section curve type flume.【Result】The average error of the optimized imitation pigeon wing section curve type flume is 1.28%, meeting the requirements. Compared with the original wing-shaped flume, the critical submergence degree working condition, the average backwater height and the average head loss of the optimized flume are reduced by 7.46% and 5.81% respectively, the flow in the upstream became smoother with the Fr<0.4. The minimum the channel gradient at which the optimized flume can work with is close to 1/5 000, and the critical submergence degree is 0.933. 【Conclusion】It is feasible to improve the performance of the wing-shaped flume by bionic optimization. The performance of the optimized imitation pigeon wing section curve type flume works well for various channels. It can be used in branch canals, bucket canals and agricultural canals. It resolves the shortcomings of large inundation outflow, serious water obstruction often seen in traditional flumes. |
| Key words: racing pigeon wings; measuring flume; height of backwater; head loss; critical submergence degree |
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