水利水电科技进展2016，Vol.36Issue(6)：35-38,89,5.DOI:10.3880/j.issn.10067647.2016.06.007
边表孔闸前吸气旋涡试验研究
Experimental study of vortex with air core in front of side crest outlet gate
摘要
Abstract
Large free-surface vortex with air-core easily occurs in front of gate at the side crest outlets. A series of physical model tests were conducted to observe the flow patterns, analyze the cause of vortex formation, study the influences of operating head, gate opening, distance from side pier to the reservoir bank and the operation conditions of crest outlet adjacent to side crest outlet on vortex, and discuss the effect of vortex on pressure of crest outlet surface. The results demonstrate that, the large vortex with air-core is mainly generated by flow around side pier, which is a special hydraulic phenomenon occurring at the side crest outlets. The air-core diameter of vortex decreases with the increase of gate opening, and increases with increasing operating head and distance from side pier to the reservoir bank; moreover, the vortex is larger when the gate of crest outlet adjacent to side crest outlet in fully opening than in partially opening conditions; the vortex leads to the occurrence of sub-pressure at the sidewall and even cavitation damage, so it should be controlled for practical engineering.关键词
吸气旋涡/泄洪表孔/工作闸门/边墩绕流/试验研究Key words
air core vortex/crest outlet/operation gate/flow around side-pier/experimental study分类
建筑与水利引用本文复制引用
马飞,王宇..边表孔闸前吸气旋涡试验研究[J].水利水电科技进展,2016,36(6):35-38,89,5.基金项目
国家自然科学基金(51579076) （51579076）
