输水隧洞水温模型  

Simulation to water temperature in tunnels

作　　者：杨开林[1] YANG Kailin(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing100038,China)

机构地区：[1]流域水循环模拟与调控国家重点实验室,中国水利水电科学研究院,北京100038

出　　处：《水利学报》2023年第4期405-413,共9页Journal of Hydraulic Engineering

基　　金：国家重点研发计划项目(2022YFC3202503);国家自然科学基金项目(U2243221,U2243239,51979291,52009144);中国水科院科研专项(HY0145B032021);水利部公益性行业科研专项(211501025)。

摘　　要：输水隧洞是长距离渠系输水工程的重要组成,北方输水隧洞水温的变化严重影响下游渠道冰情的发展。研究了输水隧洞水体的热交换,包括无压隧洞气体与洞壁和水面的热交换,提出了计算水体热交换的参数化方程和水温模型,并分析有压隧洞和无压隧洞水温的时空变化规律。结果表明:有压和无压隧洞水温均随着时间或者离开隧洞进口距离的增加呈指数规律变化,分别逐渐趋近于一个大于0℃的定值,其大小与围岩恒温层温度、水温及隧洞结构和热力学参数有关。Water conveyance tunnel is an important part of long-distance canal system water diversion project.The change of water temperature in the north tunnel seriously affects the development of downstream canal ice condition.The heat exchange of the water body in the water conveyance tunnel is studied,including the heat exchange between the gas in the unpressured tunnel and the tunnel wall and water surface.The parametric equation and water temperature model for calculating the heat exchange of the water body are proposed,and the temporal and spatial variation law of the water temperature in the pressured tunnel and the unpressured tunnel is analyzed.The results show that the water temperature of both pressured and unpressured tunnels changes exponentially with time or with the increase of distance from the tunnel inlet,and gradually approaches a fixed value,greater than 0℃,respectively,related to the temperature of surrounding rock constant temperature layer,water temperature,tunnel structure and thermodynamic parameters.

关 键 词：输水 有压隧洞 无压隧洞 热交换 水温 

分 类 号：TV672[水利工程—水利水电工程]