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建设鱼类友好型过水通道，已成为栖息地连通与保护的必然需求。为了对鱼类友好型过水通道内部水力特性进一步优化，以典型水槽试验为基础，采用开源大涡模拟代码构建三维水动力数学模型，分别对常规三角形挡板和透水三角形挡板影响下的过水通道水流开展模拟研究。结果表明，透水三角形挡板设计有效降低了主循环区的强度并抑制其发展空间；由于水流从透水孔洞流入，挡板后方的紊动能和雷诺应力强度均得到降低，垂向侧线上最大紊动能减少达34.5%;同时，在两个不同水深平面处，透水挡板设计均提高了休息区和局部低流速区的比例，并有效降低了对鱼类不利的负流速区占比。
Abstract：The construction of fish-friendly water passage has become an inevitable demand for habitat connectivity and protection. To further optimize the hydraulic characteristics of fish-friendly channels, based on a flume experiment, large-eddy simulation(LES) is used to construct a three-dimensional hydrodynamic model. The channel flow is simulated under the influence of regular triangular baffles and permeable triangular baffles. The results indicate that the permeable triangular baffle design effectively reduces the strength of the main recirculation zone and limits its development. The turbulent kinetic energy and Reynolds stress behind the baffle are reduced due to water inflow through the permeable apertures, leading to a 34.5% reduction in maximum turbulent kinetic energy along the vertical axis. Furthermore, at two different water depths, the permeable baffle design increases the proportion of resting zones and local low-velocity zones, while significantly reducing the proportion of negative flow velocity zones that are harmful to fish.
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基本信息:
DOI：10.20040/j.cnki.1000-7709.2025.20242154
中图分类号:TV135
引用信息:
[1]洪浩,戴杰,顾家丞等.基于大涡模拟的鱼类友好型过水通道水力特性研究[J].水电能源科学,2025,43(09):56-59.DOI:10.20040/j.cnki.1000-7709.2025.20242154.
基金信息:
国家自然科学基金项目(52279013); 中国长江电力股份有限公司科研项目(Z242302063)