双层翻斗式雨量计翻斗特性的试验和模拟分析

被引:4
作者
蔡钊 [1 ]
王海鹏 [1 ]
刘九夫 [1 ]
廖爱民 [1 ]
廖敏涵 [1 ]
刘宏伟 [1 ]
周斌 [2 ]
姚业 [2 ]
机构
[1] 南京水利科学研究院水文水资源研究所
[2] 红河州南源供水有限公司
基金
国家重点研发计划;
关键词
动网格; 双层翻斗式雨量计; 降水强度; 流体动力学模拟;
D O I
暂无
中图分类号
P414.95 [];
学科分类号
摘要
为探究双层翻斗式雨量计(DTBR)减小计量误差的作用机理以及进一步提高DTBR的计量精度,利用试验和数值模拟相结合的方法,通过高速摄像掌握翻斗翻转特性,结合动网格和流体体积法(VOF)模型对DTBR上层翻斗的翻转过程进行流体动力学模拟,并进一步优化了DTBR的结构设计。结果表明:DTBR依靠上层翻斗,通过中间漏斗将自然降水强度下的出流量稳定在1.01 g/s左右注入下层计量翻斗,可明显降低降水强度对雨量计计量误差的影响,且在高降水强度下的效果更加明显;中间漏斗在不同降水强度下的流量均稳定在1 g/s(等效1.91 mm/min降水强度)左右,在DTBR标定中,可考虑只对下层的计量翻斗进行1.91 mm/min降水强度的标定,即可满足DTBR的计量要求;中间漏斗存在震荡出流过程,出流最大可达2 g/s左右;降低上层翻斗的中轴高度可在一定程度上稳定中间漏斗的出流过程。
引用
收藏
页码:79 / 85
页数:7
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