电磁流速仪在测量连续弯道流速中的应用  

Application of Electromagnetic Current Meter in Bend Flow Experiments

作　　者：王连接[1] 王虹[1] 邵学军[1] 何建波[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点试验室,北京100084

出　　处：《实验室研究与探索》2010年第5期4-6,29,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金资助项目(50979043);水沙科学与水利水电工程国家重点试验室基金资助项目(2009-TC-2)

摘　　要：实测流速是研究弯道水流结构特性的重要依据。天然河流中的连续弯道形态下,水流的结构特性更加复杂,而现有的试验对连续弯道形态中的流动结构研究仍较为缺乏。采用电磁流速仪测量连续弯道中断面的流速,具体分析了该测量方法的原理和装置的具体结构和作用。与声学多普勒流速仪等方法相比,电磁流速仪能采用较小的传感器尺寸、较密集的测点布置,直接测量断面上各点的瞬时流速。分析了实际测量过程中所遇到的各种问题,提出了解决方法。Instantaneous velocity measurements are crucial to the study of turbulence structures in bend flow.A three-dimensional(3D) electromagnetic current meter was used for detailed measurements of the structure of turbulent flow in channel bends.The principle of the measurement method and the instrument structure were also discussed.Compared with other current meters,it can give more satisfactory results of vertical and cross-sectional velocity distributions.Prob-lems encountered in the experiments were also disc...

关 键 词：电磁流速仪 连续弯道 流速 

分 类 号：TV123[水利工程—水文学及水资源]