为改善养殖池内水动力条件和基于提高养殖池自净能力的需求，采用双通道排水系统来实现养殖池内固体废弃物的第一级有效分离，并对双通道养殖池内的流场特性开展研究。基于计算流体力学（CFD）技术建立了矩形圆弧角养殖池的三维湍流数值模型，并对单通道和双通道养殖池流场特性进行对比分析。结果显示：在单管入流条件下，双通道养殖池的平均速度比单通道养殖池平均增长约7%，阻力系数平均降低约13%，同时均匀系数UC50平均大幅提高约23%；而在双管入流条件下，双通道养殖池的平均速度比单通道养殖池平均增长约8%，阻力系数平均降低约14%，均匀系数UC50平均增长约7%。研究表明，双通道养殖池的底流分流比对于流场特性的影响较小，双通道排水系统能够有效改善养殖池内水动力条件，增强水力混合特性。

In order to improve the hydrodynamic conditions in the aquaculture tanks and the self-cleaning capacity of the aquaculture tanks, a dual channel drainage system was used to achieve the first effective separation of solid waste in the aquaculture tanks, and the flow field characteristics in the dual channel aquaculture tanks were studied. Based on computational fluid dynamics (CFD) technology, the three-dimensional turbulent numerical model of rectangular arc angle aquaculture tanks was established in this paper, and the flow field characteristics of single channel and dual channel aquaculture tanks were compared and analyzed. The results show that in the case of single-tube inflow, the average velocity in dual channel aquaculture tanks was about 7% higher than that of single channel aquaculture tank, the resistance coefficient was about 13% lower and the uniformity coefficient UC50 was about 23% higher greatly. While in the case of double-tube inflow, the average velocity in dual channel aquaculture tanks was about 8% higher than that of single channel aquaculture tank, the resistance coefficient was about 14% lower and the uniformity coefficient UC50 was about 7% higher. The results indicate that the underflow split ratio in the dual channel aquaculture tanks has little effect on the flow field characteristics, and the dual channel drainage system can effectively improve the hydrodynamic conditions in the aquaculture tank and enhance the hydraulic mixing characteristics.