摘要
利用激光测速仪,对光滑壁面及人工加糙的明渠紊流进行了试验,测量了光滑壁面、水力过渡面、水力粗糙面不同水深情况下明渠紊流的纵向时均流速及脉动流速。通过实测资料分析了人工加糙对明渠紊流紊动强度的影响,得到了光滑面、过渡面及粗糙面紊动强度的发展变化规律。
The turbulent flow in open channel with smooth surface and artificially made rough surface is tested, in which the longitudinal mean-flow velocity and fluctuated mean flow velocity of the turbulent flow on smooth, transitional and rough surfaces with various water depths are measured by laser Doppler velocimeter （LDV）. Based on the measured data, the effect from the artificial roughness on the turbulence intensity of the flow is analyzed, and then the developing and changing laws of the turbulence intensity for the smooth, transitional and rough surfaces of open channel are obtained.
出处
《水利水电技术》
CSCD
北大核心
2008年第9期44-46,共3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
明渠
糙率
紊流
紊动强度
open channel
roughness
turbulence
turbulence intensity
