进水口设闸控流的坝下涵管空蚀破坏及防空蚀措施

大坝与安全 ›› 2018 ›› Issue (5): 51-.

进水口设闸控流的坝下涵管空蚀破坏及防空蚀措施

蔡勇平¹，蔡晓鸿²

1.江西省吉安市水利水电规划设计院，江西吉安，343000；2.江西省吉安市水利局，江西吉安，343000

收稿日期:2018-06-27 修回日期:2018-08-08 出版日期:2018-10-08 发布日期:2018-10-08
作者简介:蔡勇平（1974- ），男，江西莲花人，高级工程师，主要从事水工建筑物设计工作。

Cavitation erosion of the culvert with gate set for flow control and its prevention

CAI Yong-ping and CAI Xiao-hong

Jiangxi Province Ji'an City Hydropower Planning and Designing Institute

Received:2018-06-27 Revised:2018-08-08 Online:2018-10-08 Published:2018-10-08

摘要/Abstract

摘要： 采用能量方程与圆形涵管发生有压水跃时第一、第二共轭水深断面的压力动量和守恒方程，计算了官溪水库坝下涵管正常蓄水位运行工况下的第一、第二共轭水深，指出了坝下涵管顶部及侧壁发生严重蚀损破坏是管内不良流态引发的空化空蚀所致，提出了防空蚀破坏措施。

关键词: 圆形涵管, 水跃, 空化空蚀

Abstract: By use of energy equation as well as the pressure momentum conservation equation for the first and second section of conjugate depths as the occurrence of hydraulic jump in the circular culvert, the first and second conjugate depths in the circular culvert of Guanxi reservoir dam under normal operation condition are calculated in the paper. The result shows that the cavitation erosion occurred on the top and side area of the circular culvert is caused by harmful flow pattern. Accordingly, prevention measures are advanced.

Key words: circular culvert, hydraulic jump, cavitation erosion

蔡勇平，蔡晓鸿. 进水口设闸控流的坝下涵管空蚀破坏及防空蚀措施[J]. 大坝与安全, 2018, 0(5): 51-.

CAI Yong-ping and CAI Xiao-hong. Cavitation erosion of the culvert with gate set for flow control and its prevention[J]. Dam & Safety, 2018, 0(5): 51-.