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Improved Wells Turbine using a Concave Sectional Profile
Sharif University of Technology.ORCID-id: 0000-0003-3973-942X
Sharif University of Technology.ORCID-id: 0000-0002-8193-6649
Sharif University of Technology. (Aerospace Research Institute, Ministry of Science and Technology)
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap. Shahid Bahonar University of Kerman.ORCID-id: 0000-0002-5976-2697
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(engelsk)Manuskript (preprint) (Annet vitenskapelig)
Abstract [en]

The current need to develop sustainable power sources has led to the development of ocean-based conversion systems. Wells turbine is a widely used converter in such systems which suffers from a lack of operational range and power production capacity under operational conditions. The profile named IFS which is concave in the post-mid-chord region, can produce significantly larger lift forces and show better separation behavior than the NACA profiles. In the present study, we tested this profile for the first time in a Wells turbine. The performance of six different blade designs with IFS and NACA profiles were evaluated and compared using a validated computational fluid dynamic model. Although the substitution of the NACA profile with the IFS profile in all cases increased the torque generated, the most efficient power generation and the largest efficient range were achieved in the design with varying thickness from the hub with a 0.15 thickness ratio reaching to the ratio of 0.2 at the tip. The operational span of this design with the IFS profile was 24.1% greater and the maximum torque generation was 71% higher than the case with the NACA profile. Therefore, the use of the IFS profile is suggested for further study and practical trials.

Emneord [en]
Wells turbine, oscillating water column, wave energy converter, computational fluid dynamics
HSV kategori
Forskningsprogram
Tillämpad matematik och beräkningsmatematik, Numerisk analys; Byggvetenskap, Strömnings- och klimatteori
Identifikatorer
URN: urn:nbn:se:kth:diva-293870DOI: 10.20944/preprints202010.0045.v1OAI: oai:DiVA.org:kth-293870DiVA, id: diva2:1548860
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QC 20210506

Tilgjengelig fra: 2021-05-03 Laget: 2021-05-03 Sist oppdatert: 2022-06-25bibliografisk kontrollert

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Forlagets fullteksthttps://www.preprints.org/manuscript/202010.0045/v1

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Saffari Pour, MohsenHulme-Smith, Christopher

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Valizadeh, RezaAbbaspour, MadjidSaffari Pour, MohsenHulme-Smith, Christopher
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