用RANS方法预报螺旋桨非定常空泡  

Prediction of Propeller Cavitation Using RANS Method

作　　者：叶金铭[1] 熊鹰[1] 王路[2] 谭廷寿[3] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033 [2]海军装备研究院舰船所,北京100073 [3]武汉理工大学交通学院,湖北武汉430063

出　　处：《中国造船》2009年第2期67-73,共7页Shipbuilding of China

基　　金：海洋工程国家重点实验室基金项目资助(编号:0719);高速船舶工程教育部重点实验室基金资助(HSSE0803);海洋工程国家重点实验室基金资助(0811)

摘　　要：基于空泡混合模型用RANS方法对螺旋桨非定常空泡进行了预报。采用尺度函数以渐进扩张的方式对桨叶表面进行网格划分,在导边、随边、叶根、叶梢等部位加密,而在桨叶表面中部单元逐渐增大。为了更好地考虑湍流边界层的流动特性,构建了棱柱层和四面体混合非结构化网格。为节约划分网格的时间,建立了一种几乎不需人为干预的快速划分螺旋桨计算域网格的方法。对非均匀进口来流用自定义函数进行设置,空泡的预报结果与试验结果吻合较好,证明该方法在螺旋桨非定常空泡计算方面的可行性和良好的应用前景。RANS simulations of flow around propellers are carried out for predecting unstable cavitation based on the mixture cavitation model. The regions around the root, tip, and blade edges are meshed with smaller triangles, while the inner region is filled with appropriately growing triangles. In order to resolve the turbulent boundary layer on the solid surfaces, the growing prismatic cells from the blade and the hub surface are set up. In order to save the time, a convenient method fastly meshed for calculating region is set up. The non-uniform inflow at the inlet boundaries is treated with User Define Functions （UDF）. The calculated result on the blade surface is compared with the measurement, and the agreement is qualitatively good. The results also show that the method is feasible and has good foreground for predicting of the propeller unsteady hydrodynamics and cavitation.

关 键 词：船舶 舰船工程 螺旋桨 非定常 空泡 RANS 

分 类 号：U661.3[交通运输工程—船舶及航道工程]