Flow separation is ubiquitous in turbomachinery. Compared with the more mature turbomachinery flow separation control method where the medium is gas, the turbomachinery flow separation method where the medium is liquid cannot be controlled well. In this study, according to the flow separation control principle of the aircraft fowler flap, taking the stator blade of the hydraulic torque converter as the basic research object, the stator blade shape is fitted with Joukowsky transformation, and then it is slotted. Computational fluid dynamics is used to perform flow analysis on original blades and slotted blades. It is found that compared with that of the original blade, the slotted blade’s flow separation phenomenon is effectively suppressed, turbulent kinetic energy is reduced, flow is more stable, and energy loss is reduced. In addition, using slotted blades for torque converter simulation, the torque ratio is increased by up to 0.245, and the efficiency is increased by up to 5%, which shows that slotted blades can improve the mechanical performance of the pump wheel and are not limited to the torque converter.

中文翻译：

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开槽叶片在提高涡轮机械性能中的应用

流动分离在涡轮机械中无处不在。与较成熟的以气体为介质的透平流分离控制方法相比，以液体为介质的透平流分离方法不能得到很好的控制。本研究以飞行器挡风板的流分离控制原理为基础，以液力变矩器的静叶片为基础研究对象，对静叶片形状进行Joukowsky变换拟合，然后进行开槽。计算流体动力学用于对原始叶片和开槽叶片进行流量分析。发现与原始叶片相比，开槽叶片的流动分离现象得到了有效抑制，湍流动能减少，流动更稳定，能量损失减少。此外，