Inherent damping in a partially dry river
Document identifier: oai:DiVA.org:ltu-76457
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10.3850/38WC092019-0281Keyword: Engineering and Technology,
Mechanical Engineering,
Fluid Mechanics and Acoustics,
Teknik och teknologier,
Maskinteknik,
Strömningsmekanik och akustik,
Ecohydraulics,
Delft3D,
Damping,
Manning number,
Strömningslära,
Fluid MechanicsPublication year: 2019Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: As intermittent power sources such as solar power and wind power gains traction in Scandinavia it is likely that the electricity production will become increasingly dependent on hydro power as a buffer in times of power deficit from intermittent power sources due to weather conditions. Rapid changes in hydro power demand can rapidly change the flow conditions in proximity to the power plant. This paper aims to model the transient behavior and quantify the inherent damping in a dry reach in proximity to the largest hydro power plant in Sweden, with respect to production. A two-dimensional model solving the Navier-Stokes equations with shallow water approximations was set up using the open-source solver Delft3D. The Manning numbers in the reach was calibrated with measured steady state water surface elevation data. The simulation data was then validated with transient water level measurements. The results show that it's possible to calibrate the Manning numbers using steady state water level measurements. The model also shows that it's possible to capture the inherent damping and more transient behavior using Delft3D. The results can be used to better model rivers without the need for resolving the upstream reach. The results can also be used for ecohydraulical applications where the transient behavior is important.
Authors
Anton Burman
Luleå tekniska universitet; Strömningslära och experimentell mekanik
Other publications
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Anders G. Andersson
Luleå tekniska universitet; Strömningslära och experimentell mekanik
Other publications
>>
J. Gunnar I. Hellström
Luleå tekniska universitet; Strömningslära och experimentell mekanik
Other publications
>>
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identifier: oai:DiVA.org:ltu-76457
datestamp: 2021-04-19T12:53:54Z
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10.3850/38WC092019-0281
titleInfo:
@attributes:
lang: eng
title: Inherent damping in a partially dry river
abstract: As intermittent power sources such as solar power and wind power gains traction in Scandinavia it is likely that the electricity production will become increasingly dependent on hydro power as a buffer in times of power deficit from intermittent power sources due to weather conditions. Rapid changes in hydro power demand can rapidly change the flow conditions in proximity to the power plant. This paper aims to model the transient behavior and quantify the inherent damping in a dry reach in proximity to the largest hydro power plant in Sweden with respect to production. A two-dimensional model solving the Navier-Stokes equations with shallow water approximations was set up using the open-source solver Delft3D. The Manning numbers in the reach was calibrated with measured steady state water surface elevation data. The simulation data was then validated with transient water level measurements. The results show that it's possible to calibrate the Manning numbers using steady state water level measurements. The model also shows that it's possible to capture the inherent damping and more transient behavior using Delft3D. The results can be used to better model rivers without the need for resolving the upstream reach. The results can also be used for ecohydraulical applications where the transient behavior is important.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Mechanical Engineering
Fluid Mechanics and Acoustics
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Maskinteknik
Strömningsmekanik och akustik
@attributes:
lang: eng
topic: Ecohydraulics
@attributes:
lang: eng
topic: Delft3D
@attributes:
lang: eng
topic: Damping
@attributes:
lang: eng
topic: Manning number
@attributes:
lang: eng
topic: Damping
@attributes:
lang: swe
authority: ltu
topic: Strömningslära
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Fluid Mechanics
genre: Research subject
language:
languageTerm: eng
genre:
conference/other
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Published
3
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Burman
Anton
1992-
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affiliation:
Luleå tekniska universitet
Strömningslära och experimentell mekanik
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antbur
0000-0003-3408-9237
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Andersson
Anders G.
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Luleå tekniska universitet
Strömningslära och experimentell mekanik
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aneane
0000-0001-9789-6293
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Hellström
J. Gunnar I.
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Strömningslära och experimentell mekanik
nameIdentifier:
gunhel
0000-0002-8360-9051
originInfo:
dateIssued: 2019
publisher: International Association for Hydro-Enviroment Engineering and Research (IAHR)
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titleInfo:
title: E-proceedings of the 38th IAHR World Congress
part:
extent:
start: 5091
end: 5100
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type: series
titleInfo:
title: Proceedings of the IAHR World Congress
identifier:
2521-7119
2521-716X
location:
url: http://ltu.diva-portal.org/smash/get/diva2:1362659/FULLTEXT01.pdf
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form: electronic
typeOfResource: text