数字农科院2.0

Research on the Flow Structure Characteristics and Stable Zone at Diversions in Irrigation Areas

文献类型： 外文期刊

作者： Hu, Runzhi;Zhao, Yanfang;Jia, Fengcong;Han, Yu;Zhang, Wenzheng

作者机构：

关键词： open channel flow;irrigation diversion;stable zone characterization;RNG k-epsilon model;ADV/ADCP measurement;flow zoning

期刊名称： PROCESSES

ISSN：

年卷期： 2025 年 13 卷 10 期

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Flow dynamics were characterized and stable zones in diversions were quantified using physical modeling, in situ experiments, and 3D numerical simulations. ADV (1 cm spatial resolution) and water-level probes (0.01 cm spatial resolution) were used in the physical experiments in a rectangular channel. ADCP (resolution of 50 cm) was employed for in situ validation at a northern China hub. Numerical simulations using ANSYS 2022R2 Fluent software with RNG k-epsilon and VOF showed little error (<15%) compared to the experiments. The results quantified the diversion zone into four sub-regions: acceleration (length 0.8-1.2 h); stabilization (1.2-3.5 h); diffusion deceleration (3.5-5.0 h); and stagnation (localized eddies, diameter 0.3-0.8 d). The stable zone length was dominantly controlled by the nonlinear coupling of geometric (B-s/B-m, 42%) and hydraulic (Fr, 28%) parameters. Upstream and downstream stable zone empirical models showed high accuracy (R-2 = 0.83 and 0.76, p < 0.01), with an average relative error <15%. Based on the proposed zoning principles and flow characteristics, measurement facilities in the irrigation area are presented. These tools enhance irrigation diversion design and management for improved water efficiency.

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