堰流的水流力特征及施工设计  

Weir flow force characteristics and construction design

作　　者：王伦聪 

机构地区：[1]广西江源水利建设工程有限责任公司,广西南宁530023

出　　处：《大众科技》2013年第8期32-33,共2页Popular Science & Technology

摘　　要：在堰顶上由于堰的上游水流受阻,水面壅高。势能转化为动能,水深变小,速度变大,使动能增大。堰流属急变流。在计算堰流时,主要考虑局部阻力,其沿程阻力可忽略。在惯性的作用下,水流溢过堰顶时,均会有脱离堰(构筑物)的趋势,在表面张力的作用下,液流的自由表面会有收缩现象。In the top of the weir upstream of the weir flow obstruction, obstruct high water, therefore, the potential energy into kinetic energy, depth becomes smaller, the speed becomes large, so that the kinetic energy increases weir is rapidly varied flow. Therefore, in the calculation of weir, the main consideration of local resistance, the resistance along the way can be ignored. In the role of inertia, the water will have to be out of weir （structures） trends when spills over weir. Under the action of surface tension, the free surface of the flow will be shrinkage.

关 键 词：堰流 薄壁堰 实用堰 

分 类 号：TV5[水利工程—水利水电工程]