寒冷地区无压输水渡槽冬季运行模型试验研究*

摘要

根据我国北方寒冷地区某无压输水渡槽工程实际，通过在室内环境箱中进行渡槽比例模型试验，研究渡槽在冬季输水过程中水流温度受外界环境温度、流速及进水口水温的影响。经过数据拟合，得到渡槽水流温度与外界环境温度、水流流速及进水口水温的回归公式，可以对不同影响条件下流经渡槽的水流温度进行预测，对同类水利工程建设及运营起到一定的指导作用。%According to the practical engineering circumstances of non-pressure water delivery flume in cold region of north China,through a series of scale model tests in environmental cabinet,the influences of environment tem-perature,flow velocity and water temperature on water flow temperature are studied when the non-pressure water delivery flume is in operation in winter.And then,this relation is regressed as a formula by data-fitting method.At last,this formula can be used to forecast the water temperature flowing in flume in varying conditions and also a guide to similar irrigation engineering construction and operation.