Experimental Investigation of a 10 MW Prototype Kaplan Turbine during Start-Up Operation
Document identifier: oai:DiVA.org:ltu-77053
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10.3390/en12234582Keyword: Engineering and Technology,
Pressure measurement,
Computer Aided Design,
Fluid Mechanics,
Strömningslära,
Torsion strain,
Bending strain,
Axial strain,
Strain measurement,
Start-up,
Mechanical Engineering,
Prototype Kaplan turbine,
Annan maskinteknik,
Other Mechanical Engineering,
Strömningsmekanik och akustik,
Maskinteknik,
Teknik och teknologier,
Fluid Mechanics and Acoustics,
Datorstödd maskinkonstruktionPublication year: 2019Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: An increase in the start/stop cycles of hydraulic turbines due to the penetration of intermittent renewable energy sources is important. Hydraulic instabilities that occur in hydraulic turbines during start/stops may cause structural issues in the turbine components. High-stress fluctuations on the runner blades are expected during start-ups due to the unsteady pressure loading on the runner blades. This paper presents experiments performed on a 10 MW prototype Kaplan turbine at the Porjus Hydropower Center during a start-up cycle. Synchronized unsteady pressure and strain measurements on a runner blade and axial, bending (in two directions) and torsion strain measurements on the shaft were performed. In addition, the general parameters of the turbine (e.g., rotational speed, guide vane opening and runner blade angle) were acquired. Low-frequency fluctuations (0–15 Hz) were observed in the pressure data on the runner blade after opening the guide vanes from the completely closed position. A higher strain value was observed on the strain gauges installed on the runner blade near the hub (200–500 μm/m ) compared to the ones near the shroud at the leading and trailing edge. The strain fluctuation level on the shaft decreased after loading the generator by further opening the guide vanes. Higher fluctuations were observed in the torsion strain compared to axial and bending strain. In addition, the torsion strain peak-to-peak value reached 12 times its corresponding value at 61% guide vane opening.
Authors
Arash Soltani Dehkharqani
Luleå tekniska universitet; Strömningslära och experimentell mekanik
Other publications
>>
Fredrik Engström
Luleå tekniska universitet; Strömningslära och experimentell mekanik
Other publications
>>
Jan-Olov Aidanpää
Luleå tekniska universitet; Produkt- och produktionsutveckling
Other publications
>>
Michel Cervantes
Luleå tekniska universitet; Strömningslära och experimentell mekanik
Other publications
>>
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header:
identifier: oai:DiVA.org:ltu-77053
datestamp: 2021-04-19T12:50:17Z
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recordCreationDate: 2019-12-03
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http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77053
10.3390/en12234582
2-s2.0-85076238316
titleInfo:
@attributes:
lang: eng
title: Experimental Investigation of a 10 MW Prototype Kaplan Turbine during Start-Up Operation
abstract: An increase in the start/stop cycles of hydraulic turbines due to the penetration of intermittent renewable energy sources is important. Hydraulic instabilities that occur in hydraulic turbines during start/stops may cause structural issues in the turbine components. High-stress fluctuations on the runner blades are expected during start-ups due to the unsteady pressure loading on the runner blades. This paper presents experiments performed on a 10 MW prototype Kaplan turbine at the Porjus Hydropower Center during a start-up cycle. Synchronized unsteady pressure and strain measurements on a runner blade and axial bending (in two directions) and torsion strain measurements on the shaft were performed. In addition the general parameters of the turbine (e.g. rotational speed guide vane opening and runner blade angle) were acquired. Low-frequency fluctuations (0–15 Hz) were observed in the pressure data on the runner blade after opening the guide vanes from the completely closed position. A higher strain value was observed on the strain gauges installed on the runner blade near the hub (200–500 μm/m ) compared to the ones near the shroud at the leading and trailing edge. The strain fluctuation level on the shaft decreased after loading the generator by further opening the guide vanes. Higher fluctuations were observed in the torsion strain compared to axial and bending strain. In addition the torsion strain peak-to-peak value reached 12 times its corresponding value at 61% guide vane opening.
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
authority: uka.se
topic:
Engineering and Technology
Mechanical Engineering
Other Mechanical Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Maskinteknik
Annan maskinteknik
@attributes:
lang: eng
topic: prototype Kaplan turbine
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lang: eng
topic: start-up
@attributes:
lang: eng
topic: pressure measurement
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lang: eng
topic: strain measurement
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lang: eng
topic: axial strain
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lang: eng
topic: bending strain
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lang: eng
topic: torsion strain
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lang: swe
authority: ltu
topic: Strömningslära
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Fluid Mechanics
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Computer Aided Design
genre: Research subject
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lang: swe
authority: ltu
topic: Datorstödd maskinkonstruktion
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
4
Validerad;2020;Nivå 2;2020-01-03 (johcin)
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Soltani Dehkharqani
Arash
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Luleå tekniska universitet
Strömningslära och experimentell mekanik
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arasol
0000-0001-5143-7729
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Engström
Fredrik
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Luleå tekniska universitet
Strömningslära och experimentell mekanik
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Jan-Olov
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Luleå tekniska universitet
Produkt- och produktionsutveckling
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0000-0001-6016-6342
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Cervantes
Michel
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Luleå tekniska universitet
Strömningslära och experimentell mekanik
nameIdentifier:
cervante
0000-0001-7599-0895
originInfo:
dateIssued: 2019
publisher: MDPI
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titleInfo:
title: Energies
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1996-1073
1996-1073
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type: volume
number: 12
@attributes:
type: issue
number: 23
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type: artNo
number: 4852
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