【摘要】 根据我国北方寒冷地区某无压输水暗渠工程实际,通过在室内环境箱中进行暗渠比例模型试验,研究暗渠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.通过改变试验条件,研究了暗渠模型内水流温度降低与外界环境温度、水流流速及进水口水温的关系.经过数据拟合,得到暗渠水流温度与环境温度、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暗渠的水流温度进行预测,并对同类水利工程建设及运营起到一定的指导作用.更多还原

【Abstract】 According to the practical engineering circumstances of no-pressure water delivery culvert in cold regions of North China,through a series of scale model tests in environmental cabinet,the influences of environment temperature,flow velocity and inlet water temperature on flow water temperature were studied.In this study,the flow water temperature deceases with environmental temperature,flow velocity and water temperature were examined by changing test conditions.Furthermore,this decease is expressed as a formula by data-fitting,which can be used to forecast the temperature of water flowing through culvert under varying conditions.This study would supply guidelines for construction and operation of similar irrigation engineering.更多还原