基于网格自适应技术的PPTC桨梢涡空泡数值模拟  

Numerical simulation of PPTC propeller tip vortex cavitation based on adaptive mesh refinement(AMR)method

作　　者：陈影 余龙[1,2] CHEN Ying;YU Long(State Key Laboratory of Ocean Engineering,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,船舶海洋与建筑工程学院,上海200240 [2]高新船舶与深海开发装备协同创新中心(船海协创中心),上海200240

出　　处：《船舶力学》2022年第4期499-510,共12页Journal of Ship Mechanics

基　　金：工信部项目(MC-201917-C09;MC-201918-C10)。

摘　　要：首先对PPTC螺旋桨在无空化流条件下进行了数值模拟,并进行网格无关性分析。然后应用Schnerr-Sauer空化模型进行空化数值模拟,将计算结果与试验结果对比,验证计算结果的准确性。与实验数据进行比较发现,使用现有方法可以较好地模拟推力系数和扭矩系数以及片空泡分布,但无法充分模拟梢涡空泡现象。故提出了一种新的网格划分策略,将螺旋管区域加密与基于气体体积分数的网格自适应技术相结合,可以成功地模拟出PPTC螺旋桨尾部的梢涡空泡,并捕获到空化涡管卷起的现象,更精确地获得了流场的空化模式。With PPTC propeller used as the test case,the numerical simulation in non-cavitation conditions was first conducted together with the grid independence studies.Then the Schnerr-Sauer cavitation model was applied to simulate the cavitation on the propeller.Both the non-cavitation flow and the cavitation flow used the Reynolds Averaged Navier Stokes(RANS)model.Through comparison of the calculation results with the experimental data,it can be found that the thrust coefficient and sheet cavitation on blades are consistent with the experiment data.However,the tip vortex cavitation cannot be fully simulated.Therefore,a new meshing strategy was proposed for combining spiral tube volume refinement and adaptive mesh refinement technology driven by vapor volume fraction.After applying this strategy to the simulation of tip vortex cavitation on PPTC propeller,the tip vortex cavitation could be captured successfully,and the complex rollup phenomena in nodes can be well captured.

关 键 词：PPTC螺旋桨 梢涡空泡 网格自适应技术 气体体积分数 

分 类 号：U661.1[交通运输工程—船舶及航道工程]