Flow characteristics and influence associated with inter-blade cavitation vortices at deep part load operations of a Francis turbine

K. Yamamoto, A. Müller, Arthur Tristan Favrel, C. Landry, F. Avellan

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

At a deep part load operation, Francis turbines are subject to the formation of inter-blade cavitation vortices inside blade channels, however its characteristics are not fully understood yet. The present study aims to investigate the development of the inter-blade vortex as well as the flow characteristics associated with the vortex formation inside the blade channel, by using the unsteady RANS simulation. The velocity survey reveals the appearance of the back flow region in the vicinity of the hub near the trailing edge, which seems closely linked with the inter-blade vortex development. Furthermore, the local influence of the inter-blade vortex is evaluated by the specific energy loss calculated from the rothalpy in the blade channel. The comparison of the different operating conditions evidences the impact of the inter-blade vortex presence on the energy dissipation through the blade channel.

Original languageEnglish
Article number012029
JournalJournal of Physics: Conference Series
Volume813
Issue number1
DOIs
Publication statusPublished - 2017 Apr 4
Externally publishedYes
EventHYdropower Plants PERformance and FlexiBle Operation Towards Lean Integration of New Renewable Energies Symposium, HYPERBOLE 2017 - Porto, Portugal
Duration: 2017 Feb 22017 Feb 3

Fingerprint

flow characteristics
turbines
cavitation flow
blades
vortices
energy dissipation
hubs
trailing edges

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Flow characteristics and influence associated with inter-blade cavitation vortices at deep part load operations of a Francis turbine. / Yamamoto, K.; Müller, A.; Favrel, Arthur Tristan; Landry, C.; Avellan, F.

In: Journal of Physics: Conference Series, Vol. 813, No. 1, 012029, 04.04.2017.

Research output: Contribution to journalConference article

@article{cf56b8eb992b46b7b7b7ccb7d5c0f988,
title = "Flow characteristics and influence associated with inter-blade cavitation vortices at deep part load operations of a Francis turbine",
abstract = "At a deep part load operation, Francis turbines are subject to the formation of inter-blade cavitation vortices inside blade channels, however its characteristics are not fully understood yet. The present study aims to investigate the development of the inter-blade vortex as well as the flow characteristics associated with the vortex formation inside the blade channel, by using the unsteady RANS simulation. The velocity survey reveals the appearance of the back flow region in the vicinity of the hub near the trailing edge, which seems closely linked with the inter-blade vortex development. Furthermore, the local influence of the inter-blade vortex is evaluated by the specific energy loss calculated from the rothalpy in the blade channel. The comparison of the different operating conditions evidences the impact of the inter-blade vortex presence on the energy dissipation through the blade channel.",
author = "K. Yamamoto and A. M{\"u}ller and Favrel, {Arthur Tristan} and C. Landry and F. Avellan",
year = "2017",
month = "4",
day = "4",
doi = "10.1088/1742-6596/813/1/012029",
language = "English",
volume = "813",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Flow characteristics and influence associated with inter-blade cavitation vortices at deep part load operations of a Francis turbine

AU - Yamamoto, K.

AU - Müller, A.

AU - Favrel, Arthur Tristan

AU - Landry, C.

AU - Avellan, F.

PY - 2017/4/4

Y1 - 2017/4/4

N2 - At a deep part load operation, Francis turbines are subject to the formation of inter-blade cavitation vortices inside blade channels, however its characteristics are not fully understood yet. The present study aims to investigate the development of the inter-blade vortex as well as the flow characteristics associated with the vortex formation inside the blade channel, by using the unsteady RANS simulation. The velocity survey reveals the appearance of the back flow region in the vicinity of the hub near the trailing edge, which seems closely linked with the inter-blade vortex development. Furthermore, the local influence of the inter-blade vortex is evaluated by the specific energy loss calculated from the rothalpy in the blade channel. The comparison of the different operating conditions evidences the impact of the inter-blade vortex presence on the energy dissipation through the blade channel.

AB - At a deep part load operation, Francis turbines are subject to the formation of inter-blade cavitation vortices inside blade channels, however its characteristics are not fully understood yet. The present study aims to investigate the development of the inter-blade vortex as well as the flow characteristics associated with the vortex formation inside the blade channel, by using the unsteady RANS simulation. The velocity survey reveals the appearance of the back flow region in the vicinity of the hub near the trailing edge, which seems closely linked with the inter-blade vortex development. Furthermore, the local influence of the inter-blade vortex is evaluated by the specific energy loss calculated from the rothalpy in the blade channel. The comparison of the different operating conditions evidences the impact of the inter-blade vortex presence on the energy dissipation through the blade channel.

UR - http://www.scopus.com/inward/record.url?scp=85017414066&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85017414066&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/813/1/012029

DO - 10.1088/1742-6596/813/1/012029

M3 - Conference article

VL - 813

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012029

ER -