河床高差对“Y”型汇流口水流水力特性的影响  

Effects of Bed Height Difference on Flow Dynamics at 'Y'Shaped Channel Confluences

作　　者：王晓刚[1] 郭维东[2] 严忠民[1] 冯亚辉[2] 杨天恩 

机构地区：[1]河海大学,南京210098 [2]沈阳农业大学,沈阳110161 [3]辽宁省营口市水利局,辽宁营口115000

出　　处：《中国农村水利水电》2005年第12期16-19,共4页China Rural Water and Hydropower

摘　　要：利用美国SonTec公司生产的三维多普勒流速仪ADV对“Y”型汇流口进行模型试验研究,结果表明,“Y”型汇流口水流为螺旋流,河床高差的存在对“Y”型汇流口水流分离区,流速加速区等主要区域影响不大,但会减弱螺旋流的旋转趋势,增加汇流口水流的脉动强度。In this paper a model test is conducted to research the effects of bed height difference on flow dynamics at Y shaped channel confluences with ADV, which is made in the SooTec Co. Inc. in U S A, and can be used to measure three-dimension velocity. As a result it can be seen there is a helix flow at Y shaped channel confluences. Difference of bed height has no obvious effect at the flow separation zone and the flow speed-up zone, but it weakens the degree of helix flow and increase the fluctuation intensity of flow at the confluence.

关 键 词：ADV 河床高差 螺旋流 

分 类 号：TV143[水利工程—水力学及河流动力学]