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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.
According to the actual situation of a non-pressure water conduit project in the northern cold region of China, the flow channel temperature in winter under the influence of external environment temperature, flow rate and water inlet temperature was studied through the underground channel proportioning model test in the indoor environment tank. Changing the experimental conditions and studying the relationship between the temperature drop of the flow in the culvert model and the ambient temperature, the flow rate of the water flow and the water temperature of the water inlet, the regression formula of the water flow temperature and the ambient temperature, the water flow velocity and the water temperature at the water inlet can be got through data fitting. It predicts the temperature of the water flowing through the culvert under different influence conditions and plays a guiding role in the construction and operation of similar water conservancy projects.