Research on Flow Stability and Vibration of an Industrial Hydraulic Turbine
Research on Flow Stability and Vibration of an Industrial Hydraulic Turbine
复制标题
工业水轮机流动稳定性与振动研究
DOI：
10.3390/pr9020311
复制
发表时间：
2021-02
期刊：
影响因子：
3.5
通讯作者：
Zhenji Tang
中科院分区：
文献类型：
--
作者：
Xianghui Su;Zixian Cao;Yi Li;Yuzhen Jin;Zhenji Tang
工业水轮机是一种结构紧凑、应用灵活的小型水轮机，常用于氢裂化、合成氨、循环水等领域。除了能量回收效率外，变速情况下的工作稳定性也是一个关键问题，因为其转速会随着上游流量参数的变化而变化。在本文中，对传统涡轮机在三种不同转速下及其最佳效率点（BEP）进行了数值研究。讨论了速度剖面、叶片载荷、压力波动和振动特征，以形成涡轮稳定性的综合评估。通过涡轮外特性和振动试验验证了数值结果。结果表明，偏离额定转速时，压力脉动和振动增大，但较低流量点的稳定性优于大流量点；主要原因是入射角和转子周向涡流。研究结论可为水轮机水力优化及工程应用提供重要参考。
Industrial hydraulic turbines, a kind of small-scaled turbine in a more compact and flexible application, are frequently used in hydrogen cracking, synthesis ammonia, and circulating water field. Besides the energy recovery efficiency, the working stability at variable speed situations is a critical issue, since its rotation speed changes with the flow parameters of the upstream. In this paper, a conventional turbine was numerically investigated under three different rotation speeds and its best efficiency points (BEPs). The velocity profiles, blade load, pressure fluctuation, and vibration features were discussed to form a comprehensive evaluation of turbine stability. The numerical results were validated through turbine external characteristic and vibration tests. The results indicate that the pressure pulsation and vibrations increase when it deviates from the rated rotation speed, but the relatively low flowrate point behaves better than the large point in the aspect of turbine stability; the main reasons are the angle of incidence and rotor circumferential vortex. The conclusions can provide significant reference for turbine hydraulic optimization and engineering application.
登录
查看更多内容
影响因子：
3.3
作者：
宿向辉;Si Huang;李昳;朱祖超;Zhigang Li
通讯作者：
Zhigang Li
影响因子：
2
作者：
Sun-sheng Yang;Hou-lin Liu;K. Fanyu;Xiao Bin;Linwei Tan
通讯作者：
Sun-sheng Yang;Hou-lin Liu;K. Fanyu;Xiao Bin;Linwei Tan
影响因子：
2.6
作者：
R. Barrio;Joaquín Fernandez;E. Blanco;J. Parrondo
通讯作者：
R. Barrio;Joaquín Fernandez;E. Blanco;J. Parrondo
影响因子：
8.4
作者：
Escaler, X;Egusquiza, E;Coussirat, M
通讯作者：
Coussirat, M
影响因子：
8.7
作者：
M. Nouni;S. Mullick;T. C. Kandpal
通讯作者：
M. Nouni;S. Mullick;T. C. Kandpal