In the current study, the turbulent cavitation flow around a marine propeller in a nonuniform wake is simulated with the shear stress transport (k−ω SST) turbulence model combining Zwart–Gerber–Belamri (ZGB) cavitation model. The predicted cavity evolution shows a fairly well agreement with the available experimental results. Important mechanisms of propeller cavitation flow, including side-entrant jet and cavitation-vortex interaction, are analyzed in this paper. Vorticity is found to be mainly located in cavitation regions and the propeller wake during propeller rotating. The unsteady behavior of cavitation and side-entrant jet can both promote local vorticity generation and flow unsteadiness. In addition, it is indicated with the relative vorticity transport equation that the stretching term plays a major role in vorticity transportation, while baroclinic torque and Coriolis force term mainly influence the vorticity distribution along the liquid-vapor interface.

中文翻译：

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均匀尾迹中E779A螺旋桨周围非定常空化流的数值研究，并探讨了空化如何影响涡流

在当前的研究中，利用剪切应力传递（k - ωSST）模拟了非均匀尾流中船用螺旋桨周围的湍流空化流。）湍流模型，结合了Zwart–Gerber–Belamri（ZGB）空化模型。预测的空腔演化表明与可用的实验结果相当吻合。本文分析了螺旋桨空化流动的重要机理，包括侧向射流和空化-涡旋相互作用。发现涡度主要位于空化区域，并且在螺旋桨旋转期间螺旋桨苏醒。空化和侧向射流的不稳定行为会促进局部涡流的产生和流动的不稳定。另外，由相对涡度输运方程表明，拉伸项在涡度输运中起主要作用，而斜压转矩和科里奥利力项则主要影响沿液-汽界面的涡度分布。