摘要
[目的]为了探究空泡的形成与水翼参数之间的关系,通过对比不同参数的水翼在不同来流攻角下的空泡形成情况,探索各种因素对空泡形成的影响。[方法]基于势流理论,采用边界元法和迭代法,对二维水翼的局部空泡进行系统性分析。[结果]结果表明,最大厚度不同的水翼在来流攻角较小时,产生的空泡较小;在来流攻角较大时,产生的空泡更大。水翼的最大厚度位置位于40%弦长处的水翼对来流攻角的改变更为敏感,受到的影响更大。水翼的相对拱度对空泡形成的大小随着来流攻角的增大,先增大后减小。[结论]在气泡尾部封闭点,通过半解析模型求解气泡尾部交点的法向速度,可以提高气泡数值模拟的稳定性,进而可以得到水翼参数对空泡形成更为准确的影响。
[Objective]In order to explore the relationship between cavitation formation and hydrofoil para-meters,this study compares the cavitation formation of hydrofoils with different parameters at different attack angles,and explores the influence of various factors on cavitation formation.[Methods]Based on potential flow theory,the local cavitation of a two-dimensional hydrofoil is systematically analyzed using the boundary element and iterative methods.[Results]The results show that the cavitations of hydrofoils with different maximum thicknesses are smaller when the attack angle of the incoming flow is smaller,and larger when the attack angle is larger.The maximum thickness of the hydrofoil has a significant effect on cavitation formation when the attack angle is large.Hydrofoils with a maximum thickness at 40%of the chord edge are more sensit-ive to changes in the attack angle of the incoming flow and experience a stronger effect.The influence of the relative camber of the hydrofoil on cavitation formation first increases and then decreases as the attack angle increases.[Conclusions]At the closed point of the bubble tail,the semi-analytical method can be used to solve the normal velocity of the intersection point,thereby improving the stability of the numerical simulation of bubbles in the iterative process and clarifying the influence of hydrofoil parameters on cavitation formation.
作者
鹿玮川
孙士艳
王树齐
LU Weichuan;SUN Shiyan;WANG Shuqi(School of Naval Architecture&Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China)
出处
《中国舰船研究》
CSCD
北大核心
2024年第3期241-248,共8页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(52271276)
江苏省自然科学基金资助项目(BK20201006)。
关键词
边界元方法
二维水翼
局部空化
空泡尾部奇异性
boundary element method
two-dimensional hydrofoil
local cavitation
singularity of bubble tail