摘要
运用相似理论对泥沙模型的粒径比尺进行了分析,提出了推移质、悬移质和全沙模型泥沙粒径相似条件;给出了包括细沙在内的泥沙起动粒径比尺的统一计算式和适用不同流区的悬沙粒径比尺的统一计算式;指出模型砂的起动流速不等于模型的起动流速,需进行比尺效应修正。
By similartiy theory,the grain-size scale of sediment model is analyzed and similarity conditions between grain sizes if bed load,suspended load and model sand are presented.Then a unified formula for size scale of sediment starting(including cohesive material)and that for size scale of suspended load suitable for various flow areas is obtained.And finally,it's proposed that scale effect should be modified,as starting velocity of model sand is not equivalent to that of model;and it's also indicated that it's nearly impossible to reach similarity of sediment model.
出处
《水道港口》
2004年第1期1-6,共6页
Journal of Waterway and Harbor
关键词
相似理论
泥沙模型
粒径比尺
泥沙起动
泥沙悬移
similarity theory
sediment model
grain-size scale
sediment starting
sediment suspension
