为改善水产养殖池内的水动力条件，同时兼顾降低工厂化循环水养殖的能源消耗，采用计算流体力学（Computational Fluid Dynamics，CFD）技术，建立对直双管（两个进水管布设于不相邻的两个直壁中间位置）入流的养殖池三维数值计算模型，对不同射流角度的方形圆弧角养殖池内流场特性开展数值模拟。结果显示：射流角度对养殖池内平均流速和流场分布均匀性的影响明显；在同一循环次数设定条件下，当射流角度在0°~10°区间，有利于获得更高的水体流速和更均匀的流场，尤其以射流角度为0°时效果最优，养殖池内流场特性总体上优于其他工况，满足降低养殖能耗与兼顾营造养殖生物所需适宜流场的需求。本研究可为工厂化循环水养殖系统流场的设计营造提供参考。

In order to improve the hydrodynamic conditions of aquaculture tank and reduce the energy consumption of industrial recirculating aquaculture, a three-dimensional numerical calculation model of aquaculture tank with water inlet on straight wall double pipe (two inlet pipes arranged in the middle of two non-adjacent straight walls) was established by using computational fluid dynamics (CFD) technology, and the flow field characteristics in the square arc angle aquaculture tank with different jet angles were simulated numerically. The results show that the jet angle has obvious influence on the average velocity and the uniformity of flow field distribution in the aquaculture tank. Under the same cycle number setting condition, when the jet angle is between 0 ° and 10 °, it is conducive to obtain higher water velocity and more uniform flow field. Especially when the jet angle is 0 °, the effect is the best, and the flow field characteristics in the aquaculture tank are better than those under other working conditions, which can meet the needs of reducing the energy consumption of aquaculture and constructing a suitable flow field for breeding creatures. This study can provide a reference for the design and construction of flow field in the industrial recirculating aquaculture system.