基于信息扩散方法的闸门流态过渡段流量计算  

Flow calculation of gate flow transition section based on information diffusion method

作　　者：陈晓楠 王艺霖 靳燕国 顾起豪 张召[2] CHEN Xiaonan;WANG Yilin;JIN Yanguo;GU Qihao;ZHANG Zhao(China South-to-North Water Diversion Middle Route Co.,Ltd.,Beijing 100038,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]中国南水北调集团中线有限公司,北京100038 [2]中国水利水电科学研究院,北京100038

出　　处：《南水北调与水利科技(中英文)》2024年第S2期37-42,共6页South-to-North Water Transfers and Water Science & Technology

基　　金：水利青年科技英才资助项目(JHYC202207)。

摘　　要：闸门过渡流态下水流特性复杂,不确定性扰动大,过闸流量计算难度增加。为保障调水工程安全运行及科学调度,实现对弧形闸门过闸流量的精确计算,提出基于信息扩散理论的流态过渡段流量计算模型。以南水北调中线工程淇河倒虹吸出口节制闸、白河倒虹吸出口节制闸两座典型闸门为研究对象,通过筛选出历史运行数据中相对开度e/H在0.5~0.7的水情数据作为孔流和堰流过渡段数据,利用信息扩散模型计算过渡段流量,并与单点经验公式法、两点线性插值法的流量计算结果进行对比。结果表明:相较于单点经验公式法、两点线性插值法,信息扩散法通过对特征点数量的有效扩充,利用多点非线性的概化方式对过渡流态中的扰动和误差进行了平滑降噪处理,因此该方法对闸门过渡段流量计算具有更高精度,计算精度最大提升11.60%和2.36%。该研究为南水北调中线工程闸门过渡段过闸流量的精细化计算及数字孪生仿真预演建设提供了科学依据。The complexity of water flow characteristics in the transition flow state of the gate and the large uncertainty perturbation make the calculation of over-gate flow more difficult.In order to guarantee the safe operation and scientific dispatching of water transfer projects and realize the accurate calculation of the flow rate of the arc gate,a flow rate calculation model was proposed for the transition section of the flow pattern based on the information diffusion theory.Taking the two typical gates of Qi River inverted siphon outlet control gate and Bai River inverted siphon outlet control gate of the Middle Route of South-to-North Water Transfers Project as the research objects,we calculated the flow rate of the transition section using the information diffusion model by screening out the water condition data with the relative openness e/H in the range of o.5~0.7 in the historical operation data as the data of the transition section of the orifice and weir flows and compared it with the results of the flow rate calculations of the single-point empirical formula method and the two-point linear interpolation method.Comparison was made.The results show that compared with the single-point empirical formula method and the two-point linear interpolation method,the information diffusion method,through the effective expansion of the number of feature points,makes use of the multi-point nonlinear generalization to smooth and reduce the noise of the perturbations and errors in the transitional flow state,so that the method has a higher precision for the calculation of the flow rate of the transitional section of the gates,and the maximum improvement of the calculation accuracy is 11.6% and 2.36%.This study provides a scientific basis for the refined calculation of the transition state overflow of the gates of the Middle Route of South-to-North Water Transfers Project and the construction of the digital twin simulation preview.

关 键 词：南水北调中线工程 信息扩散 弧形闸门 流态辨识 过渡段流量计算 

分 类 号：TV68[水利工程—水利水电工程]