基于UG-FLUENT的溢洪道消力池水力特性影响研究  

Research on the Influence of Hydraulic Characteristics of Spillway Stilling Pool based on UG-FLUENT

作　　者：许超 王星彦 吕晓云 XU Chao;WANG Xing-yan;LV Xiao-yun(Jiangsu Water Conservancy Engineering Technology Consulting Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]江苏省水利工程科技咨询股份有限公司,江苏南京210000

出　　处：《海河水利》2022年第3期114-118,126,共6页Haihe Water Resources

摘　　要：为研究水利枢纽溢洪道尾水渠消力池水力特征影响变化,采用UG建模平台与FLUENT流场计算平台开展了不同流量、不同坎高方案下压强特征计算。静压强以低流量下、大坎高下最大,流量每增加10 m^(3)/s或坎高每增大5 cm,则断面平均静压强可下降20%或上升34.5%;边墙连接点处静压强水平低于池底,但波动性较小。池内高程与静压强具有负相关关系,但高程增大,坎高差异引起的降能减冲效果减弱。脉动压强均方差参数与流量值具有正相关关系,而坎高与之为负相关,流量每增大10 m^(3)/s或坎高增大5 cm,平均方差参数可上升34.5%或下降27.1%。消力池中、下游断面上对水力势能限制作用较强,坎前断面脉动压强方差高于坎后,坎高增大有利于控能减冲。该研究可为水工结构中消力池设计与运营提供参考。In order to study the influence changes of hydraulic characteristics of the stilling pool of the spillway and tail channel of water conservancy project,the UG modeling platform and the FLUENT flow field calculation platform ware used to calculate the pressure characteristics under different flow rates and different height schemes. The static pressure strength is the largest at low flow rate and large height. The average static pressure strength decreases 20% and increases 34.5%when the flow rate increases by 10m^(3)/s or the height increases by 5cm. The static pressure level at the side wall connection point is lower than the bottom of the pool,but the fluctuation is small. The height in the pool is negatively correlated with the static pressure,but the effect of energy reduction and stroke reduction caused by the difference of height decreases with the increase of height. The mean square error of pulsating pressure is positively correlated with the flow value,while the height is negatively correlated with it. When the flow increases by 10m^(3)/s or the height increases by 5cm,the mean square error increases by 34.5% and decreases by 27.1%. There is a strong restriction effect on hydraulic potential energy in the middle and downstream sections of the stilling pool. The variance of fluctuating pressure in the front section of the stilling pool is higher than that in the back section,and the increase of the stilling height is beneficial to energy control and shock reduction. This paper can provide reference for the design and operation of the stilling pool in hydraulic structure.

关 键 词：UG-FLUENT 水利枢纽 溢洪道 消力池 

分 类 号：TV653.1[水利工程—水利水电工程] TV131