摘要
本文对我国研制的 MB-2型和美国研制的 TR-2型两种卵石推移质采样器的水力特性进行了对比试验研究。得到 TR-2型仪器的表面和形状阻力及器内阻力比 MB-2型仪器的小:MB-2型仪器的水力效率为0.91,TR-2型仪器的水力效率为1.04:两种仪器置入水中后增大了水流的紊动强度,且TR-2型仪器比 MB-2型仪器所引起的水流紊动强度为大。
The comparison of hydraulic characteristics is presented for two gravel bedload samplers.They are the flexible-bottom Minjiang Bedload-2 basket sampler,designed by Sichuan Provincial Hydrometric Station,Sichuan,Chi- na.and Toutle River-2 pressure-difference sampler.designed by the U.S. Geological Survey.The results of this study show that the hydraulic efficie- ncy of the TR-2 sampler is approximately 1.04 and that of the MB-2 sam- pler is about 0.91.When two samplers are rested on the streambed,tur bulence intensity will increase,and the turbulence intensity of the TR-2 sam- pler is larger than that of the MB-2 sampler.
基金
水电部水利水电科学基金课题
关键词
推移质
采样器
卵石
水力特性
bedload sampler
hydraulic efficiency
turbulence intensity
