绕扭曲翼型三维非定常空泡脱落结构的数值分析  

Numerical analysis for three dimensional unsteady cavitation shedding structure over a twisted hydrofoil

作　　者：季斌[1] 罗先武[1] 彭晓星[2] 吴玉林[1] 许洪元[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《水动力学研究与进展（A辑）》2010年第2期217-223,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(No.50976061;50676044);北京市自然科学基金(No.3072008)资助

摘　　要：该文以一种三维扭曲翼型为研究对象,采用均衡流空化模型和基于滤波器的湍流修改模式模拟了绕翼型非定常空化流动。计算结果显示,在一定条件下绕翼型的空泡流动存在两种脱落结构,即主体脱落和二次脱落。进一步的流场分析表明回射流和侧面射流是这两种空泡脱落结构产生的主要原因。计算结果与试验的比较说明,该文采用的数值模拟方法可成功模拟实验观测的空泡脱落现象。The unsteady cavitating flow around a twisted hydrofoil was numerically simulated by adopting a specialized filter-based turbulence model and homogenous cavitation model. Based on the calculated results, it is noted that there were two kinds of cavities shedding i.e. primary shedding and secondary shedding for the cavitating flow around a foil under certain condition. Further analysis of the cavitating flow field shows that two kinds of cavities shedding were mainly resulted from the re-entraut jet and the side entrant jet respectively. The comparisons between the calculated and the experimental results indicate that the numerical method adapted in this paper was capable to satisfactorily simulate the cavities shedding phenomena observed in the experiment.

关 键 词：回射流 侧面射流 主体脱落 二次脱落 扭曲翼型 

分 类 号：U664.3[交通运输工程—船舶及航道工程]