CAJ | 학술논문

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.
해문이일충삼유뉴곡익형위연구대상,채용균형류공화모형화기우려파기적단류수개모식모의료요익형비정상공화류동.계산결과현시,재일정조건하요익형적공포류동존재량충탈락결구,즉주체탈락화이차탈락.진일보적류장분석표명회사류화측면사류시저량충공포탈락결구산생적주요원인.계산결과여시험적비교설명,해문채용적수치모의방법가성공모의실험관측적공포탈락현상.
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-entrant 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.