泄洪雾化降雨模型相似性探讨  

Discussion on the scale effect of discharge atomization-rainfall model

作　　者：周辉[1] 吴时强[1] 陈惠玲[1] 

机构地区：[1]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029

出　　处：《水科学进展》2009年第1期58-62,共5页Advances in Water Science

基　　金：国家自然科学基金资助项目(50579084);雅砻江水电开发联合基金资助项目~~

摘　　要：泄洪雾化影响的研究和预测目前仍然以大比尺模型试验研究为主,但模型缩尺效应是制约这一方法准确预报泄洪雾化影响范围及程度的关键因素。根据乌江渡水电站泄洪雾化原型观测资料,通过系列模型试验研究,分析了水流Re和We数对泄洪雾化降雨强度的影响,对泄洪雾化雨强的模型试验值与原型观测结果之间的相似关系进行了探索,研究了雾化降雨影响区域的不同比尺模型试验测试结果之间的几何相似性。A series model method is adapted to the preliminary study of scale effect of discharge atomization-rainfall （A-R） model with the field observation result of discharge atomization for Wujiangdu power station. The effect of Re and We numbers of flow on the A-R intensity is analyzed. A conversion relationship of A-R intensity between prototype and model results is de- veloped. The similitude criteria of the A-R range followed by discharge atomization model is discussed, and the conclusion is achieved that the surface tension of discharge A-R model is ignored when We number is larger than 500.

关 键 词：雾化降雨 缩尺效应 物理模型试验 乌江渡水电站 

分 类 号：TV135.2[水利工程—水力学及河流动力学]