摘要
压力进水口前的漩涡是常见的水力现象,研究漩涡的水力特性,是认识和消除进水口漩涡的基础。研究进水口前漩涡的主要方法有室内缩尺物理模型试验、理论研究及数值模拟等。主要对进水口漩涡水力特性和临界淹没水深的研究成果进行了分析总结;根据漩涡是否吸气对其进行分类,分析各种漩涡可能产生的危害,并总结了漩涡产生的影响因素、缩尺效应和进水口的临界淹没水深公式。最后指出,应加强电站进水口漩涡的原型观测统计,以及双层或多进水口临界淹没水深的研究。
Abstract：The vortex often occurs at the intake of hydraulic structure,and to avoid the vortex,the hydraulic characteristics of vortex at intakes should be studied.The current research methods of vortex are mainly physical model experiments of some hydropower projects.And there is also relatively large progress with the study on the theory and numerical model of vortex.The paper presents a brief review of the hydraulic characteristics of vortex and the critical submergence at intakes,and classifies the vortexes according to whether there is air-core or not.Then it analyses all the possible damages,influencing factors and scale effect of vortexes,and summarizes the empirical formulae of critical submergence at intakes.At last,the paper indicates that in the future the prototype test and critical submergence at double-layer intake should be paid more attention.
出处
《南水北调与水利科技》
CAS
CSCD
2010年第5期129-132,共4页
South-to-North Water Transfers and Water Science & Technology
基金
高等学校博士学科点专项科研基金(20060003039)
