【摘要】 为提高城市应对复杂气候的能力、满足城市双向抽水的需要，针对广泛应用的双向轴流泵开展优化研究，以提高双向轴流泵的水力性能、减小水泵能耗。首先基于工作面为前凹后凸、前凸后凹的S翼型与平板翼型，采用组合优化策略与数值模拟相结合的方法，对一比转数为1 200的双向泵叶轮进行优化设计，并对比3种翼型叶轮优化设计结果，从中选择性能最优的翼型方案展开全参数优化。研究结果表明：由前凹后凸的S翼型设计得到的叶轮综合性能最优，内部流态最为平稳，平板翼型次之，前凸后凹的S翼型最差。前凹后凸的S翼型可作为双向泵设计的优选方案，而前凸后凹的S翼型叶轮为空化性能约束所需的盘面比较大，叶轮效率明显低于其它方案，不适宜作水力机械设计使用。同时适当减小轮缘和轮毂处翼型拱度、增大叶片中部翼型拱度，有利于双向泵性能的提升。经过叶片参数优化，0.8、1.0、1.2倍正向设计流量工况下叶轮效率上升1.7、1.8、5.2个百分点，研究结果可为可逆式旋转机械的优化设计提供参考。更多还原

【Abstract】 Aiming to enhance the capability of cities to cope with complex climate conditions and satisfy the need for bi-directional pumping, an optimization study was conducted on widely used bi-directional axial flow pumps. The aim was to improve their hydraulic performance and reduce energy consumption. Initially, based on the S-hydrofoil with concave-convex and convex-concave profiles relative to the working face, as well as flat plate hydrofoils, a combined optimization strategy was employed in conjunction with numerical simulation to optimize the impeller design of a bi-directional pump with a specific speed of 1 200. The optimized designs of impellers using these three types of hydrofoils were compared, and the optimal hydrofoil configuration was selected for further full-parameter optimization. The research findings indicated that the impeller designed by using the concave-convex S-hydrofoil exhibited the best overall performance, with the most stable internal flow pattern, followed by the flat plate hydrofoil, and the convex-concave S-hydrofoil performed the worst. The concave-convex S-hydrofoil can be considered as the preferred option for bi-directional pump design. In contrast, the convex-concave S-hydrofoil impeller required a relatively large blade area radio due to cavitation performance constraints, resulting in significantly lower impeller efficiency compared with other designs, making it unsuitable for hydraulic machinery applications. Additionally, appropriately reducing the camber of the hydrofoil at the shroud and hub while increasing it in the middle of the blade favors enhanced bi-directional pump performance. Following blade parameter optimization, the impeller efficiency was increased by 1.7, 1.8, and 5.2 percentage points at 0.8, 1.0, and 1.2 times the forward design flow conditions, respectively. The research result can provide valuable insights for the optimization design of reversible rotating machinery.更多还原