龙头桥水库溢洪道流场数值模拟及优化研究  

Numerical simulations and optimization of flows on spillway of Longtouqiao reservoir

作　　者：耿敬[1] 马世领 李刚[1] 朱睿 GENG Jing MA Shiling LI Gang ZHU Rui(Ship Engineering College, Harbin Engineering University, Harbin 150001)

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《水力发电学报》2017年第10期74-83,共10页Journal of Hydroelectric Engineering

基　　金：基金项目:松花江干流治理工程流凌演进机理及堤防防护技术研究(SLKYG2015-923)

摘　　要：龙头桥水库溢洪道在实际运行过程中,泄槽段内出现了较为严重的水冠和折冲水流现象。针对该问题,本文基于物模实验和数值模拟相结合的研究方法:建立溢洪道三维结构模型,运用RNG k-ε紊流模型、修正的Simple算法和VOF多相流方法,对溢洪道流场进行数值模拟;运用物模实验对溢洪道的泄流能力、水面线、流速和堰面压力等水力特性数模结果进行验证分析,两者吻合较好。通过对溢洪道流场分析,得到水冠和折冲水流的特性和发生位置,最终从中墩厚度和尾墩型态进行优化,多组方案的数模和物模实验结果表明,优化结果良好。In operation of the Longtouqiao reservoir spillway, serious phenomena of water crown and deflected flow occurred in the chute section behind the gate pier. Aiming at this problem, physical model tests and numerical modeling were conducted in this study to simulate the 3D flows on the spillway, using an RNG k-ε turbulence model, modified SIMPLE algorithm, and VOF model. Comparison shows that the numerical calculations of hydraulic characteristics agree well with the model test results, including spillway capacity, water surface profile, flow velocity, and pressure on the weir. And the simulations can well describe the locations and behaviors of the water crown and flow deflection. To improve the flow regime, we optimized the thickness of the gate pier and its tail shape through examining a set of modification schemes, and achieved satisfactory results that were verified by the model tests and numerical simulations.

关 键 词：溢洪道 水冠 折冲水流 优化 

分 类 号：TV135.2[水利工程—水力学及河流动力学]