摘要
超空化现象由于可被应用于水下运动物体的减阻而重新引起了人们的关注。为了了解超空化流动区域的流动特性,观察了超空化流动区域的流动结构;采用LDV的方法测量了超空化发生时绕水翼的速度分布大小。结果表明,当空化发展到超空化阶段,在流动区域内形成明显的空化和水流两个流动区域。在超空化流动区域内,充满了空泡和水的混合物。靠近界面的区域内,混合液流的流速和主流区域的流速大小基本相同,而在邻近翼型表面的区域内,具有较大的速度梯度。
Supercavitation has attracted growing interests due to its potential for vehicle maneuvering and drag reduction. In order to clarify the flow characteristics of supercavitation area, supercavitation flow velocity distribution around a hydrofoil are addressed along with both high-speed visualization and LDV measurements. There is a distinct interface between the main flow and the supercavitating flow. The cavitating region is filled with cavitation bubble and water mixture. The velocity of the cavitation bubbles near the interface is almost the same as that of the main flow. Large velocity gradient is observed in the inner layer near the foil surface.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2003年第4期606-608,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50276004)
教育部留学回国人员科研启动基金
关键词
超空化
LDV
流动模型
supercavitation phenomenon
LDV
flow model
