漫湾电站溢流表孔掺气减蚀的试验研究  

Experimental Research or Air Entrainment and Cavitation Control of Overflow Surface Bays for Manwan Plant

作　　者：杨炳桂[1] 李一丁[1] 唐峥嵘[1] 

机构地区：[1]电力部昆明勘测设计研究院科研所

出　　处：《云南水力发电》1995年第4期83-88,共6页Yunnan Water Power

摘　　要：漫湾水电站溢流表孔的掺气减蚀设施，通过不同比尺的模型试验研究，优化出以坎、槽组合型较好。根据试验成果分析，并结合施工现场实况，为设计推荐掺气设施的布置型式、位置、体型尺寸均为工程采用并已建成。从１９９４年汛期原型观测的成果表明：掺气浓度沿程分布、通气孔风速、进气量、空腔负压及气水比等项成果与模型试验规律基本一致，均满足规范要求。说明设计的掺气设施的体型、尺寸是合理的、有效的。Having studied some model tests with different scales, it is better to use a sill-chute combination construction for the air entrainment and cavitation control facilities at Manwan overflow surface bays. In accordance with the consequence analysis of experiments and applying them to reality in-situ, the layout, positions and configurations of the air entrainment facilities suggested for the project have been adopted and completed. During the period of a flood season in 1994, the prototype observation showed that: the distribution of air entrainment densities along their route, velocity of ventilation, content of entrained air, negative pressure of cavities and the air-water ratio in the vent ducts were keeping well with the fundamental rules of model tests and satisfied the demand of current code. So it is considered that the design made for air entrainment facilities is reasonable and effective in practice.

关 键 词：水电站 溢流表孔 掺气减蚀 模型试验 

分 类 号：TV135.206[水利工程—水力学及河流动力学]