摘要
通过激光测速仪,对壁面糙率突变时的明渠紊流进行试验,测量了糙率突变不同水深情况下明渠紊流的纵向时均流速和脉动流速。通过实测资料分析不同糙率突变和不同水深的紊流摩阻流速变化情况和水流的壁面切应力的特点。
The turbulent flow in open channel is tested with laser-Doppler anemometer, in which the longitudinal time average velocity and fluctuating velocity of turbulent flow in open channel under the conditions of the sudden changes of roughnesses at different water depths are measured. Based on the measured data, the change of the friction velocity of turbulent flow and the characteristics of the wall shear stress under different sudden roughnesses and different water depths are analyzed herein.
出处
《水利水电技术》
CSCD
北大核心
2007年第1期89-92,共4页
Water Resources and Hydropower Engineering
基金
河北省科技领军人才创新资金项目资助(06547001D-4)
关键词
糙率
紊流
摩阻流速
壁面切应力
roughness
turbulent flow
friction velocity
wall shear stress
作者简介
张红光（1969-），男，讲师。
