Analysis of the part load helical vortex rope of a Francis turbine using on-board sensors

F. Duparchy, A. Favrel, P. Y. Lowys, C. Landry, A. Müller, K. Yamamoto, F. Avellan

研究成果: Conference article査読

14 被引用数 (Scopus)

抄録

The cavitation helical vortex rope arising at Francis turbine partial load induces pressure fluctuations at the rope precession frequency, which can be decomposed into two components; the convective one and the synchronous one. The latter acts as an excitation source for the hydraulic system and is amplified in case of resonance. The present paper aims to highlight the impact of both components on the mechanical behaviour of the runner by performing on-board measurements. It is shown that the use of on-board pressure sensors enables to naturally separate the components of the pressure fluctuations. In addition, the synchronous component has little impact on the mechanical behaviour of the runner, even for the case in which hydro-acoustic resonance occurs.

本文言語English
論文番号012061
ジャーナルJournal of Physics: Conference Series
656
1
DOI
出版ステータスPublished - 2015 12 3
外部発表はい
イベント9th International Symposium on Cavitation, CAV 2015 - Lausanne, Switzerland
継続期間: 2015 12 62015 12 10

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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