摘要
采用丹麦产二维激光流速仪对二维加糙明渠紊流进行了试验，获得了比较全面的紊动结构及阻力资料，并系统地分析了试验成果．着重探讨了二维粗糙床面的理论基面、当量糙率值的确定以及粗糙对时均结构和脉动结构的影响等问题．
With the help of 2 D laser doppler anemometry,experiments of turbulent flow are made in a two dimensional strip roughness flume.The turbulence structures and the resistance data are given,and the test results are systematically analysed.In addition,some problems are discussed emphatically,such as the theoretical position of datum plane,equivalent sand grain roughness size,and the influence of roughness elements on the structural characteristics of time averaged velocity and fluctuation velocity.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1998年第1期93-98,共6页
Journal of Hohai University(Natural Sciences)
关键词
二维加糙
明渠
当量糙率
湍流结构
试验研究
laser doppler anemometry
two dimensional strip roughness flume
time averaged velocity
fluctuation velocity
theoretical position of datum plane
equivalent sand grain roughners
