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Pressure probe with five embedded flush-mounted sensors: unsteady pressure and velocity measurements in hydraulic turbine model

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Abstract

The unsteady five-hole Pitot tube, with embedded flush-mounted sensors, provides one of the most advanced experimental techniques in fluid mechanics stemming from Pitot tube. This instrument enables the measurement of both unsteady pressures and instantaneous three-dimensional velocity vectors. The present paper focuses on the methodology and use of this type of probe in hydraulic turbines. Different fluctuating phenomena can be monitored, providing reliable estimates regarding amplitude and frequency. The probe is particularly advantageous for applications when the flow exhibits large angular fluctuation. In such cases, even the mean values must be validated using unsteady measurements. The calibration method and the validation of the unsteady measurements are presented through three different hydraulic turbine models.

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Acknowledgments

The authors would like to thank the participants of the Consortium on Hydraulic Machines for their support and contribution to this research project: Alstom Power & Transport, Andritz Hydro LTD, Edelca, Hydro-Quebec, Laval University, NRCan, Voith Hydro Inc. Our gratitude goes as well to the Canadian Natural Sciences and Engineering Research Council who provided funding for this research.

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Authors and Affiliations

  1. Hydraulic Machine LAboratory (LAMH), Department of Mechanical Engineering, Laval University, Pavillon Adrien-Pouliot, 1065 Avenue de la Medicine, Québec, G1V 0A6, Canada

    Pierre Duquesne, Gabriel Dan Ciocan, Vincent Aeschlimann & Claire Deschênes

  2. Alstom Power Hydro, Global R&D, Alstom Hydro France, Etablissement de Grenoble, 82 Avenue Leon Blum, BP 75, 38041, Grenoble Cedex 9, France

    Antoine Bombenger

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  1. Pierre Duquesne
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  2. Gabriel Dan Ciocan
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  3. Vincent Aeschlimann
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  4. Antoine Bombenger
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  5. Claire Deschênes
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Correspondence to Pierre Duquesne.

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Duquesne, P., Ciocan, G.D., Aeschlimann, V. et al. Pressure probe with five embedded flush-mounted sensors: unsteady pressure and velocity measurements in hydraulic turbine model. Exp Fluids 54, 1425 (2013). https://doi.org/10.1007/s00348-012-1425-y

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  • DOI: https://doi.org/10.1007/s00348-012-1425-y

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