Affiliation:
1. China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing 100038, China e-mail:
Abstract
The pressure fluctuations in both the rotating runner and the other fixed components in a model Francis turbine under various loads were experimentally measured by means of onboard measuring equipment in the runner and data storage device on the shaft in this study. Large pressure fluctuations were observed under both small guide vane opening and large guide vane opening conditions. Flow separation at the blade suction surface led to large pressure fluctuations for small guide vane openings, the unsteady flow around the inlet on the blade pressure side led to large pressure fluctuations for large openings. The pressure fluctuations correlation between the runner and other components of the turbine, mainly the draft tube, was analyzed in detail for both small guide vane opening (12 deg) and large guide vane opening (30 deg). The results show that the pressure fluctuations in the runner space increased by the superposition of draft tube vortex rope pressure fluctuations and runner inter blade vortices pressure fluctuations, resulting in much larger pressure fluctuations in the runner space than in other components.
Funder
National Natural Science Foundation of China
China Institute of Water Resources and Hydropower Research
Reference22 articles.
1. Bing, F. A., 2008, “Development of Large Hydraulic Turbine Sets in Recent 30 Years in China,” Large Hydroelectric Generating Units, pp. 1–8.
2. Chen, G., and Feng, Z. Q., 2008, “Design of Baihetan Hydropower Station 1000 MW Hydraulic Turbine Units,” Large Hydroelectric Generating Units, pp. 9–12.
3. Hydro Turbine Operating Region Partitioning Based on Analyses of Unsteady Flow Field and Dynamic Response;Sci. China: Technol. Sci.,2010
4. Experimental and Numerical Studies for a High Head Francis Turbine at Several Operating Points;ASME J. Fluids Eng.,2013
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献