水利学报2011，Vol.42Issue(10)：1234-1238,5.
混流式水轮机部分负荷下尾水管压力脉动试验研究
Study on pressure fluctuation in Francis turbine draft tubes during partial load
张飞 1高忠信 1潘罗平 1葛新峰1
作者信息
- 1. 中国水利水电科学研究院水力机电研究所,北京100038
- 折叠
摘要
Abstract
The pressure fluctuation in Francis turbine draft tubes during partial load was analyzed based on field test data of the Three Gorges Hydropower Plant. Inapplicability of two current used formulas for calculating the vortex belt frequency of turbine draft tube pressure fluctuation was analyzed. The test results indicated that in lower partial load, under certain water head the main frequency of draft tube pressure fluctuation decrease with the increase of discharge. In higher partial load the main frequency has the distribution of V type with the variation of discharge, which may have the relation with draft tube inherent frequency. In certain guide vane angle, during partial load the main frequency of draft tube pressure fluctuation had no definite relation with water head. Meanwhile, in partial load the draft tube pressure fluctuation may have direct influence to unit stability. The pressure fluctuation in draft tube was the main cause influencing the stability parameter variation.关键词
尾水管/部分负荷/压力脉动/主频/稳定性Key words
Draft tube/partial load/pressure fluctuation/main frequency/stability分类
建筑与水利引用本文复制引用
张飞,高忠信,潘罗平,葛新峰..混流式水轮机部分负荷下尾水管压力脉动试验研究[J].水利学报,2011,42(10):1234-1238,5.
