摘要
介绍小型高速水洞的设计原则,在现有圆形水洞的基础上,建立2种实验段截面为方形的水洞模型;利用Fluent对3种模型的收缩段和实验段流场进行对比。结果表明,当实验段的截面由圆形改为其内接正方形时,满足流速不均匀度小于1%的区域缩小为原来的0.6倍;在实验段入口前添加过渡段,增加收缩段出口到实验段入口的距离,可以降低实验段的湍流度。
The design principles of water-tunnel were introduced, and two models with square test sections were pro- posed deriving from a minitype high-speed water-tunnel. The software Fluent was used to analyze the performance of con- tractions and test sections of the water-tunnels. It is found that, in the square test section,the area where velocity unevenness is below 1% shrunk to 0. 6 of that in the circular one. The turbulence intensity decreases when there is a transitional section between the contraction and the test section.
出处
《润滑与密封》
CAS
CSCD
北大核心
2012年第6期9-14,共6页
Lubrication Engineering
基金
国家自然科学基金创新研究群体科学基金项目(51021064)
国家自然科学基金项目(51075228)
关键词
水洞
流体力学
摩擦阻力
water tunnel
fluid dynamic
friction resistance
