糙条消减弯段溢洪道水流能量试验研究  

Experimental Research on Water Flow Energy Reduction of Spillway in Curved Section with Rough Energy Dissipation

作　　者：贾萍阳 牧振伟[1] 李凡琦 孙德旭 张红红 JIA Ping-yang;MU Zhen-wei;LI Fan-qi;SUN De-xu;ZhANG Hong-hong(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院

出　　处：《中国农村水利水电》2019年第8期116-119,128,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51769037)

摘　　要：为研究糙条消能工对弯道水流能量的消减过程,利用模型试验结合数值模拟方法对溢洪道模型进行研究,采用水能耗散率、流速均匀度、主流区位置作为评价溢洪道流态改善效果的指标,结果表明,糙条的置入可以消减水流能量,同时降低下游流速,增加下游水深;糙条使纵向流速沿横断面趋向均匀分布,缩短弯道出口直段调整距离;糙条将偏向凸岸的主流区引导至溢洪道轴线,抑制冲击波在弯道内形成。To study the rough energy dissipation on the reduction of the energy flow process in curved spillway,this paper uses the method of model experiment combined with numerical simulation study of generalized spillway model,water power dissipation rate,flow velocity uniformity,mainstream area as evaluation index of spillway flow improvement.The results show that the rough energy dissipation can reduce flow energy,lower the downstream flow rate and increase the downstream water depth.Rough energy dissipation makes cross section velocity evenly distributed and reduces the straight section adjustment distance at the outlet of the bend.Rough energy dissipation can guide the mainstream area that is inclined to convex bank to the axis of spillway and restrain the shock wave propagation to the downstream straight section.

关 键 词：糙条 水能耗散率 流速均匀度 主流区位置 

分 类 号：TV653.1[水利工程—水利水电工程]