节能2024，Vol.43Issue(3)：30-33,4.DOI:10.3969/j.issn.1004-7948.2024.03.008
阀门开度对余压发电水轮机水力性能的影响研究
Study on the influence of valve opening on hydraulic performance of pressure recovery hydropower turbine
梁武科 1丁科 2李其昌 2董剑1
作者信息
- 1. 西安理工大学水利水电学院,陕西 西安 710048
- 2. 国家电投集团 重庆狮子滩发电有限公司,四川 重庆 401220
- 折叠
摘要
Abstract
To investigate the influence of valve opening on the hydraulic performance of a pressure recovery hydropower turbine,the study focused on a pressure recovery hydropower turbine at the Xiaojia River Sewage Treatment Plant.Three valves with different openings were selected for comparison.Numerical simulations of the entire flow passage were conducted using the standard k-ε turbulence model in Ansys CFX software.The study aimed to reveal the relationship between valve opening and the hydraulic performance of the pressure recovery hydropower turbine.The results showed that the effect of valve opening on the external characteristics of the pressure recovery hydropower turbine followed a non-linear relationship.When the valve opening was less than 50°,changes in the opening significantly affected the head,but as the opening increased,the influence gradually decreased.Additionally,an increase in flow rate widened the differences in the external characteristics among different valve openings.The high-turbulence region was mainly distributed near the draft tube and the valve.With an increase in flow rate,the high-turbulence region near the valve of the pressure recovery hydropower turbine expanded,while the high-turbulence region near the draft tube decreased.Under the same operating conditions,a larger valve opening resulted in fewer high-turbulence regions within the flow passage,while an increase in flow rate increased the differences in turbulence characteristics caused by the valve opening.关键词
阀门开度/余压发电水轮机/水力性能/数值分析Key words
valve opening/pressure recovery hydropower turbine/hydraulic performance/numerical analysis分类
建筑与水利引用本文复制引用
梁武科,丁科,李其昌,董剑..阀门开度对余压发电水轮机水力性能的影响研究[J].节能,2024,43(3):30-33,4.
