不同体型台阶泄洪排沙洞水流比能特性研究  

STUDY ON FLOW SPECIFIC ENERGY CHARACTERISTICS OF STEPPED FLOOD DISCHARGE AND SEDIMENT DISCHARGE TUNNELS WITH DIFFERENT SHAPES

作　　者：杜新国 Du Xing-guo

机构地区：[1]中铁十四局集团第二工程有限公司,河南洛阳471000

出　　处：《建筑技术开发》2022年第13期92-94,共3页Building Technology Development

摘　　要：台阶式泄洪排沙洞消能效果的研究十分复杂。以断面比能作为参数,研究在不同台阶高度和不同单宽流量下的消能效果。在泄洪排沙洞泄洪过程中,沿阶梯式泄洪排沙洞的水流比能先逐渐增大,最后趋于稳定,水流断面比能稳定时的影响因素与流程无关;在不同的单宽流量条件下,水流断面比能随单宽流量的增大而增大。单宽流量与水流比能呈正相关关系;水流断面比能随台阶高度的增加而减小。台阶高度为2 m时泄洪排沙洞的消能效率比台阶高度为0.5 m时的消能效率高18.3%。The research on the energy dissipation effect of stepped flood discharge and sediment discharge tunnel is too complex, but the energy dissipation research of stepped flood discharge and sediment discharge tunnel by domestic and foreign scholars has never stopped. This paper takes the section specific energy as the parameter,the energy dissipation effect under different step height and different unit width flow is studied. In the flood discharge process of the flood discharge and sediment discharge tunnel, the flow specific energy along the stepped flood discharge and sediment discharge tunnel first increases gradually and finally tends to be stable. When the specific energy of flow section is stable, the influencing factors are independent of the process. Under different unit width discharge conditions, the specific energy of flow section increases with the increase of unit width discharge. There is a positive correlation between unit width discharge and flow specific energy. The specific energy of flow section decreases with the increase of step height. When the step height is 2m, the energy dissipation efficiency of the flood discharge and sediment discharge tunnel is 18.3% higher than that when the step height is 0.5m.

关 键 词：台阶式泄洪排沙洞 消能 断面比能 单宽流量 台阶高度 

分 类 号：TU135.2[建筑科学—建筑理论]