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.
出处
《中国农村水利水电》
北大核心
2005年第12期16-19,共4页
China Rural Water and Hydropower
关键词
ADV
河床高差
螺旋流
ADV
bed Difference of height
helix flow
