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Article

Inner Damping of Water in Conduit of Hydraulic Power Plant

Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Tomonobu Senjyu
Sustainability 2021, 13(13), 7125; https://doi.org/10.3390/su13137125
Received: 23 April 2021 / Revised: 13 June 2021 / Accepted: 14 June 2021 / Published: 25 June 2021
The operation of any hydraulic power plant is accompanied by pressure pulsations that are caused by vortex rope under the runner, rotor–stator interaction and various transitions during changes in operating conditions or start-ups and shut-downs. Water in the conduit undergoes volumetric changes due to these pulsations. Compression and expansion of the water are among the mechanisms by which energy is dissipated in the system, and this corresponds to the second viscosity of water. The better our knowledge of energy dissipation, the greater the possibility of a safer and more economic operation of the hydraulic power plant. This paper focuses on the determination of the second viscosity of water in a conduit. The mathematical apparatus, which is described in the article, is applied to data obtained during commissioning tests in a water storage power plant. The second viscosity is determined using measurements of pressure pulsations in the conduit induced with a ball valve. The result shows a dependency of second viscosity on the frequency of pulsations. View Full-Text
Keywords: second viscosity; bulk viscosity; measurement; hydraulic power plant; conduit; pressure pulsations; dissipation; damping second viscosity; bulk viscosity; measurement; hydraulic power plant; conduit; pressure pulsations; dissipation; damping
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MDPI and ACS Style

Himr, D.; Habán, V.; Štefan, D. Inner Damping of Water in Conduit of Hydraulic Power Plant. Sustainability 2021, 13, 7125. https://doi.org/10.3390/su13137125

AMA Style

Himr D, Habán V, Štefan D. Inner Damping of Water in Conduit of Hydraulic Power Plant. Sustainability. 2021; 13(13):7125. https://doi.org/10.3390/su13137125

Chicago/Turabian Style

Himr, Daniel, Vladimír Habán, and David Štefan. 2021. "Inner Damping of Water in Conduit of Hydraulic Power Plant" Sustainability 13, no. 13: 7125. https://doi.org/10.3390/su13137125

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