摘要
介绍最新声学多普勒流速仪的工作原理 ,它可测量瞬时三维速度 ,并可直接获得紊动参数 .讨论了该流速仪在不同采样频率和采样体高度条件下对测速的影响 ,以及在四面六边框架体阻力特性和紊动射流特性研究中的应用情况 .
The principle of new ADV is introduced, with which 3 D flow velocity can be measured instantaneously, and turbulence parameters can be obtained directly. Meanwhile, the influences of the velocimeter on the measurement of velocity under different sampling frequencies and sampling volumes are discussed. Finally, an analysis is performed of the application of the velocimeter to research of the effects of tetrahedron frameworks on velocity decrease and the characteristics of turbulent jets.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第3期15-18,共4页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金资助项目 (5 97790 11)
教育部青年骨干教师资助项目 (5 0 0 0 63 )
关键词
声学
多普勒流速仪
射流
水动力学
Doppler shift
pulse coherent processing
sampling volume
turbulent jet
