有压流改造方案对渡槽过流能力提升的影响  

Impact of Pressurized Flow Modification Scheme on the Enhancement of Aqueduct Flow Capacity

作　　者：李屾 杨康华 刘培 薛海[2] LI Shen;YANG Kanghua;LIU Pei;XUE Hai(Canal Head Branch of China South-to-North Water Transfer Group Middle Route Co.,Ltd.,Nanyang 473000,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,China)

机构地区：[1]中国南水北调集团中线有限公司渠首分公司,河南南阳473000 [2]华北水利水电大学,河南郑州450046

出　　处：《华北水利水电大学学报(自然科学版)》2025年第2期102-111,共10页Journal of North China University of Water Resources and Electric Power:Natural Science Edition

基　　金：国家自然科学基金重点项目(41930643)。

摘　　要：南水北调工程作为我国水资源调配的重大水利工程,对优化我国水资源时空配置有着战略性意义。随着中线工程加大流量输水工作的顺利完成,大流量输水期间渡槽段出现了波浪交替回涌的复杂流态,不仅干扰输水工作的正常进行,而且对渡槽结构的安全产生隐患。为此,研究渡槽复杂波浪流态的产生机理,提出波浪消减方案,对提升渡槽的过流能力和水流稳定性具有重要工程价值。采用现场观测与数值模拟相结合的方法探究波浪回涌的机理,为了抑制波浪并提升流量,提出针对某渡槽的有压流改造方案,并用4座不同形式的渡槽来验证方案的普适性。结果表明:有压流改造方案对某渡槽波浪交替回涌现象具有良好的抑制效果,渡槽过流能力最高可提升31.0%;通过有压流改造方案,4座不同形式渡槽的过流能力均出现不同程度的提升,这对提升渡槽的过流能力和水流稳定性具有参考价值。The South-to-North Water Diversion Project,a pivotal initiative in China's water resource management,strategically optimizes the distribution of water resources across the nation,significantly enhancing the efficiency of water allocation and contributing to sustainable development.Following the successful enhancement of water conveyance capacity in the Middle Route of the South-to-North Water Diversion Project,the aqueduct section has experienced intricate flow patterns characterized by alternating wave surges during periods of high-flow conveyance.which not only interfered with the normal operation of water conveyance while simultaneously posing potential safety risks to the aqueduct's structure.Hence,investigating the generation mechanisms of these intricate wave flow patterns within aqueducts and suggesting wave mitigation strategies hold considerable engineering application value for improving the flow efficiency and stability of aqueducts.This study integrates field observations with advanced numerical simulations,such as those using MATLAB and Fluent,to deeply explore the underlying mechanisms of wave surges.and proposes a pressurized flow modification scheme for an aqueduct from the perspective of suppressing waves and thereby increasing flow capacity.The universality of the scheme is verified using four aqueducts of different forms.The pressurized flow modification scheme has been shown to effectively mitigate the alternating wave surge phenomenon in a specific aqueduct,significantly improving its flow capacity by up to 31.0%,as evidenced by similar techniques in water flow management.Through the pressurized flow modification scheme,the flow capacities of the four aqueducts of different forms are improved to varying degrees,providing a reference for enhancing the flow capacity and stability of aqueducts.

关 键 词：过流能力提升 有压流改造方案 波浪回涌 数值模拟 

分 类 号：TV672.3[水利工程—水利水电工程]