摘要
梢涡空泡的初生问题在空泡研究领域中一直是一个难题,对梢涡空泡的研究不仅可以用来预报空泡初生,还能在在此基础上研究出改进措施.在此对近20年来梢涡空泡理论和数值计算的相关内容进行了分析总结.梢涡空泡的初生受到多种因素的影响:流体品质(主要指流体中游离气核的尺寸分布),流场平均压力,以及局部脉动压力.现今提出的初始梢涡空泡数尺度公式将这三个因素都考虑在内,但脉动压力和流体品质的真正作用机理还需进一步研究.在数值计算领域,主要建立了球形空泡模型和非球形空泡模型,对在考虑不同因素下的整个梢涡空泡变化过程进行了模拟计算.
The inception of the tip vortex cavitation（TVC）is very important in cavitation studies.The study of the tip vortex cavitation is not only conductive to its prediction,but also helps to suppress or suspend the occurrence of cavitation.In this paper,the research progresses on the TVC inception including theoretical and numerical studies mainly in the last two decades are reviewed.It is shown that the TVC inception is affected by complicated factors,such as the water quality,average pressure and fluctuating pressure.In the scaling law for the determination of TVC inception,all these factors are considered.To precisely describe the scaling law,more investigations are needed to understand the effects of the water quality and fluctuating pressure.In the numerical simulation,both the spherical bubble model and non-spherical bubble dynamic model have been established to simulate the process of TVC for different factors.
出处
《武汉理工大学学报（交通科学与工程版）》
2016年第2期303-308,314,共7页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目资助(51179198)
关键词
梢涡空泡初生
尺度效应
球形气泡模型
非球形气泡模型
tip vortex cavitation inception
scaling law
spherical bubble model
non-spherical bubble dynamic model
