长江科学院院报2018，Vol.35Issue(6)：6-11,18,7.DOI:10.11988/ckyyb.20170161
减速流条件下床面泥沙起动试验研究
Experimental Study on Incipient Motion of Bed Sediment under Decelerating Flow Condition
摘要
Abstract
The deceleration flow,called backwater in engineering,is a pattern of non-uniform flow.Research of bed sediment's incipient motion under deceleration flow condition is of great application value in water conservancy pro-ject.In line with generalized flume experiment and field measured natural flow data,four classic formulae for incipi-ent flow velocity are verified and compared.Results suggest that all the four classic formulae are suitable for decel-eration flow condition in flume experiment,yet difference still exists in the selection of particle size.Representative particle size d95 is of good accuracy.Moreover,the incipient motion of sediment under deceleration flow meets the Shields curve in general.According to verification of power incipient motion formula,the dimensionless incipient power is 0.0191 ,which can be used as the criterion of bed sediment initiation.关键词
床面泥沙/减速流/水槽试验,起动标准/试验研究Key words
bed sediment/deceleration flow/flume experiment/incipient motion standard/experimental study分类
建筑与水利引用本文复制引用
汤洁,林木松,闫霞,金中武,刘同宦..减速流条件下床面泥沙起动试验研究[J].长江科学院院报,2018,35(6):6-11,18,7.基金项目
国家重点研发计划项目(2016YFC0402307) （2016YFC0402307）
国家自然科学基金项目(51339001 ,51479009,51679010) （51339001 ,51479009,51679010）
