水沙自加速异重流水槽试验研究  

Experimental Study on Self-Accelerating Turbidity Currents in Flume

作　　者：江肖鹏 王远见[1,2] 杨飞 杨洲 JIANG Xiaopeng;WANG Yuanjian;YANG Fei;YANG Zhou(Yellow River Institute of Hydraulic Research,YRCC,Zhengzhou 450003,China;Key Laboratory of Lower Yellow River Channel and Estuary Regulation,MWR,Zhengzhou 450003,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]黄河水利委员会黄河水利科学研究院,河南郑州450003 [2]水利部黄河下游河道与河口治理重点实验室,河南郑州450003 [3]河海大学水利水电学院,江苏南京210098

出　　处：《人民黄河》2023年第2期38-41,46,共5页Yellow River

基　　金：国家重点研发计划项目(2021YFC3200404);国家自然科学基金资助项目(42041004,52179066);河南省自然科学基金资助项目(202300410540)。

摘　　要：自加速异重流虽在理论上早已被证明存在,但是现实中受观测条件限制,仅在个别大河入海口被观测到。设置了一个水沙异重流试验水槽,在不同工况下分别塑造了减速异重流和自加速异重流过程,试验结果验证了自加速异重流发生的理论临界条件,系统描述了异重流自加速与减速的演进过程。Although self-accelerating turbidity current has been demonstrated in theory, it is only occasionally observed at the estuary of some large rivers due to the difficulty in obtaining field currents data. This paper set up a water and sediment density current experimental flume, where the decelerating currents and self-accelerating currents had been achieved under different conditions. Based on this experimental results, adjoined water and sediment characteristics have revealed at current head evolution, thereafter, the experimental results verify the theoretical critical conditions for the occurrence of self-accelerating turbidity current.

关 键 词：自加速异重流 临界条件 头部流速 水槽试验 

分 类 号：TV145.2[水利工程—水力学及河流动力学]