Výsledky vyhledávání

Eigenfrequencies of rotating discs in dense fluid: imposed modal motion approach

Autor: B Nennemann, C Monette, O Braun, Daniel Biner, Cécile Münch-Alligné

Publikováno v: IOP Conference Series: Earth and Environmental Science. 1079:012072

The mode split on disc like structures rotating in a dense fluid leads to a deviation of eigenfrequencies at high rotational speeds compared to their values in still water. Predicting eigenfrequencies correctly is essential to avoid fatigue cracks on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::38c144fc283de3a9de082f8eff1c32a6
https://doi.org/10.1088/1755-1315/1079/1/012072

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Validation of deep part load dynamic stresses for axial runners

Autor: C Monette, J Chamberland-Lauzon, B Nennemann

Publikováno v: IOP Conference Series: Earth and Environmental Science. 1079:012100

To accommodate renewable energy production and load demand variability, hydropower plant owners need to increase their operating range regardless of their units’ original design load envelop. When this increased operating range is an issue for the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0216a3b5c188904baa9bca21f704c27b
https://doi.org/10.1088/1755-1315/1079/1/012100

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Characterization of no-load conditions for a high head Francis turbine based on the swirl level

Autor: M Fortin, B Nennemann, S Houde

Publikováno v: IOP Conference Series: Earth and Environmental Science. 1079:012010

This paper compares the average flow topology in the draft tube cone of a high head Francis turbine operated at full-gate opening no-load (runaway) and speed-no-load (SNL). The comparison is based on the swirl level in the turbine quantified with the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::34790d627ed4dbdd8cbc26dc700cb73b
https://doi.org/10.1088/1755-1315/1079/1/012010

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Geometric parameters of influence on rotor stator interaction in radial hydraulic turbines

Autor: C Monette, B Nennemann, O Braun, S Afara

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012122

Numerical methods for the prediction of the hydraulic forcing from rotor stator interaction (RSI) in hydraulic turbines as well as the corresponding methods to calculate mechanical dynamic stresses are mature and well-established in the industry. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::abea60d8a7b340336fda5bffc1ffe01d
https://doi.org/10.1088/1755-1315/774/1/012122

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Shear and vortex instabilities at deep part load of hydraulic turbines and their numerical prediction

Autor: J Chamberland-Lauzon, B. Nennemann, T. Jurvansuu, M. Gauthier, S Afara, C. Monette, M. Melot

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012114

For all types of turbines, deep part load operation (DPL) poses a challenge. An example of a dynamic phenomenon due to vaneless space vortices occurring at DPL is presented for three turbine types: a diagonal, a propeller and a Francis turbine. The b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f74fb43a5c7a1ef9f5821b7ec1aedd4e
https://doi.org/10.1088/1755-1315/774/1/012114

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Evolution of discharge and runner rotation speed along no-load curves of Francis turbines

Autor: C Deschênes, M Fortin, S Houde, B Nennemann

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012121

In hydraulic turbines, no-load operation is among the most damaging conditions since unextracted swirl leads to the creation of highly energetic flow structures causing high pressure and strain fluctuations on the turbine components. To date, experim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d519517624a517b04547b8b875a8d8d
https://doi.org/10.1088/1755-1315/774/1/012121

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Francis turbine dynamic stresses measurements at model and prototype scales

Autor: S Afara, J DiSciullo, J Chamberland-Lauzon, B Nennemann, C Monette

Publikováno v: IOP Conference Series: Earth and Environmental Science. 774:012081

A strain gauge and pressure measurement campaign on a model runner with a modern design was performed. The reference prototype runner was commissioned in 2013 and strain gauge measurements on the prototype are available for comparison. The model runn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16d962771dc49574dc5a49c3c6dfe6be
https://doi.org/10.1088/1755-1315/774/1/012081

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Akademický článek

Francis turbine dynamic stresses measurements at model and prototype scales.

Autor: J., Chamberland-Lauzon, J., DiSciullo, C., Monette, B., Nennemann, S., Afara

Publikováno v: IOP Conference Series: Earth & Environmental Science; 2021, Vol. 774, p1-10, 10p

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