基于流动控制技术，以某型号的低比转速离心式不锈钢冲压叶轮作为研究模型，采用数值模拟和试验研究了叶片不同开缝位置（r/R）对叶轮内部能量、湍流动能及耗散率分布的影响，同时制作了开缝叶片离心泵样机模型，并进行了试验验证，分析了叶片上开缝的相对位置对离心泵的扬程及效率等外特性的影响，比较了叶片有、无开缝的性能变化。研究结果表明：叶片开缝的位置对叶轮内流体能量的分布以及获得的总压能影响较大；开缝的存在会引起离心泵内部流场的变化，在开缝的地方会产生湍动能及耗散率的突变；不同的开缝相对位置对离心泵性能影响不同，开缝的相对位置为0.875，与没有开缝叶片的离心泵相比，效率提高了1.52%，拓宽了离心泵的高效区间，在大流量时，开缝存在起到了抑制分离的产生，提高了离心泵的扬程，改善了叶轮流道中流体的流动状态。

Based on the flow control technology,a model of low specific speed centrifugal with stainless steel stamping impeller was used as a research model.The numerical simulation and experimental investigation were used to study the energy,turbulent kinetic energy and turbulent dissipation rate distribution of impeller at different slit positions.The model of slotted blade centrifugal pump was fabricated.The experimental results of centrifugal pump with slotted blades were validated.The influence of relative position of slot on head and efficiency of centrifugal pump was analyzed.The results of the performance of non-sewed seam show that the location of slits has a great influence on distribution of total pressure energy and the energy obtained in impeller.The existence of slits will cause the variation of the flow field inside centrifugal pump.The turbulent kinetic energy and dissipation rate experience abrupt change in the place of the slits.The relative positions of different slits have different influences on the centrifugal pump performance.The efficiency of pump with slotted blades of relative position 0.875 is increased by 1.52% compared with the centrifugal pump without slotted blades.The slotted blades of flow control technology broaden the operating range of centrifugal pumps with high efficiency.Under the high flow rate condition,the presence of slits inhibits separation,increases the head of the centrifugal pump,and improves the fluid flow in the impeller flow path.

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四川省科技厅计划项目（2019YJ0451）；四川省教育厅项目（172467）；西华大学校重点基金项目（Z1620408）；西华大学青年学者后备人才项目