0
research-article

Experimental Study of the Francis Turbine Pressure Fluctuations and the Pressure Fluctuations Superposition Phenomenon Inside the Runner

[+] Author and Article Information
Zhongxin Gao

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
gaozhx@iwhr.com

Wenruo Zhu

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
kenanzwr@126.com

Long Meng

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
menglong429@gmail.com

Jianguan Zhang

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
zhangjg@iwhr.com

Fei Zhang

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
spiritgiant@126.com

Luoping Pan

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
panlp@iwhr.com

Li Lu

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing, China 100038
luli@iwhr.com

1Corresponding author.

ASME doi:10.1115/1.4038535 History: Received April 09, 2017; Revised October 15, 2017

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 fluctuation 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°) and large guide vane opening (30°). 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.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In