水垫塘的水流特征和消能规律研究

Study on flow characteristics in water cushion pool and mechanism of energy dissipation

结合乌江构皮滩水利枢纽工程消能问题研究 ,用热膜流速仪在比尺为 1∶380的精细模型上量测了拱坝挑跌流在水垫塘内的流速场 ,并由试验成果分析了淹没射流在水垫塘内的消能过程 ,计算了消能率。研究表明 ,要想提高水垫塘的消能效率 。

Through study on energy dissipation of Goupitang Project on the Wu jiang River,the velocity field in the water cushion pool downstream ski jump or drop was measured by hot film anemometers on a fine model with scale 1∶380. The energy dissipation process in the water cushion pool was analysed using experimental results,and the rate of energy dissipation was calculated.The study showed that if a project requires to raise its rate of energy dissipation,the strong turbulent shear flow region must be extended.