To reveal the cavitation forms of tip leakage vortex (TLV) of the axial flow pump and the flow mechanism of the flow field, this research adopts the partially-averaged Navier-Stokes (PANS) model to simulate the cavitation values of an axial flow pump, followed by experimental validation. The experimental result shows that compared with the shear stress transport (SST) k - ω model, the PANS model significantly reduces the eddy viscosity of the flow field to make the vortex structure clearer and allow the turbulence scale to be more robustly analyzed. The cavitation area within the axial flow pump mainly comprises of TLV cavitation, clearance cavitation and tip leakage flows combined effect of triangular cloud cavitation formed. The formation and development of cavitation are accompanied by the formation and evolution of vortex, and variations in vortex structure also generate and promote the development of cavitation. In addition, an in-depth analysis of the relationship between the turbulent kinetic energy (TKE) transport equation and cavitation patterns was also conducted, finding that the regions with relatively high TKE are mainly distributed around gas/liquid boundaries with serious cavitation and evident gas-liquid change. This phenomenon is mainly attributed to the combined effect of the pressure action term, stress diffusion term and TKE production term.

为了揭示轴流泵叶尖泄漏涡(TLV)的空化形式和流场的流动机理，本研究采用部分平均纳维-斯托克斯(PANS)模型来模拟轴流泵的空化值，然后进行实验验证。实验结果表明，与剪应力传递（SST）k - ω模型相比，PANS模型显着降低了流场的涡粘性，使涡结构更加清晰，使得湍流尺度分析更加鲁棒。轴流泵内的空化区域主要由TLV空化、间隙空化和叶尖泄漏流共同作用形成的三角云空化组成。空化的形成和发展伴随着涡流的形成和演化，涡流结构的变化也产生和促进空化的发展。此外，还深入分析了湍流动能（TKE）输运方程与空化模式之间的关系，发现TKE较高的区域主要分布在空化严重、气体明显的气/液边界周围。 -液体变化。这种现象主要归因于压力作用项、应力扩散项和TKE产生项的综合作用。