摘要
在木坡水电站长期运行过程中,河床中的泥沙淤积现象严重地影响电站的安全运行。为揭示河道中泥沙的分布特性,用数值模拟与试验验证相结合的方法,在试验与仿真数据高度吻合的基础上采用DPM模型对木坡水电站河道模型进行固液两相分析,并在泥沙分布明显的尾水渠处对拦沙坎进行改型设计,对比分析河道内的液相分布、颗粒分布和尾水渠处颗粒的分布情况。结果表明:河道内整体的液相体积分数和颗粒质量浓度分布区域面积均随流量的增大有所增加,但改型后的液相体积分数面积明显增加,颗粒质量浓度分布区域明显减小;尾水渠的颗粒分布与流量呈正相关,改型后的尾水渠拦沙坎区域的泥沙分布均得到有效控制,验证了拦沙坎改型的成功性。
During the long-term operation of Mupo hydropower station,the sediment deposition in the riverbed has been seriously affecting the safe operation of the power station.In order to reveal the distribution characteristics of sediment in the river channel and put forward its improvement measures,this study combines numerical simulation and experimental validation,and uses the DPM model to analyze the solidliquid two phases of the river channel model of Mupo hydropower station on the basis of the high degree of consistency between the experimental and simulation data,as well as the modified design for the sand barriers in the tailwater channel where the sediment distribution is obvious,so as to compare and analyze the distribution of the liquid phase,the particle distribution,and the distribution of the particles at the tailwater channel.The results indicate that the liquid-phase volume fraction and particle mass concentration distribution area in the river channel increase with the growth of flow,but the liquid-phase volume fraction area increases and the particle mass concentration distribution area decreases after the modification.And the particle distribution in the tailwater channel is positively correlated with the flow,and the sediment distribution in the area of the tailwater channel sand barriers after the modification is effectively controlled,which also verified the success of the modification of the sand barriers.The results of this study can provide effective engineering value for the stable operation of the unit and normal drainage of the tailwater channel.
作者
杨炳全
孟帮杰
薛玉林
任良均
鲜喜敏
唐漫琪
YANG Bingquan;MENG Bangjie;XUE Yulin;REN Liangjun;XIAN Ximin;TANG Manqi(Power China Hydropower Development Group Co.,Ltd.,Chengdu 618000 China;School of Energy and Power Engineering,Xihua University,Chengdu 610039 China)
出处
《西华大学学报(自然科学版)》
2025年第4期92-98,共7页
Journal of Xihua University:Natural Science Edition
基金
中央引导地方科技发展资金面上项目(2021ZYD0038)
四川省科技计划资助(2022ZDZX0041)。
关键词
DPM模型
河道
尾水渠
固液两相
泥沙分布
DPM model
river channel
tailwater channel
solid-liquid two-phase
sediment distribution
