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首页> 外文期刊>Shock and vibration >Numerical Investigation of Unsteady Cavitation Flow around E779A Propeller in a Nonuniform Wake with an Insight on How Cavitation Influences Vortex
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Numerical Investigation of Unsteady Cavitation Flow around E779A Propeller in a Nonuniform Wake with an Insight on How Cavitation Influences Vortex

机译：非均匀迹象中E779A螺旋桨围绕E779A螺旋桨的非稳态空化流量的数值研究，了解空化对涡流的洞察

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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.
机译：在目前的研究中，利用Zwart-Gerber-belamri（ZGB）空化模型的剪切应力传输（k≤ωsst）湍流模型模拟了在非均匀迹象中的湍流空化流动。 预测的腔腔进化与可用的实验结果相当好。 本文分析了螺旋桨空化流动的重要机制，包括侧进入射流和空化 - 涡流相互作用。 涡旋主要位于空化区域和螺旋桨旋转期间的螺旋桨唤醒。 空化和侧参赛者喷射的不稳定行为都可以促进局部涡流产生和流动不稳定。 另外，它用相对涡流传输方程表示，拉伸术语在涡旋运输中起主要作用，而曲金扭矩和科里奥利力术语主要影响沿液体蒸汽界面的涡流分布。

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