• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire Ingénierie des fluides Systèmes énergétiques (LIFSE)
  • View Item
  • Home
  • Laboratoire Ingénierie des fluides Systèmes énergétiques (LIFSE)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Innovative design method and experimental investigation of a small-scale and very low tip-speed ratio wind turbine

Article dans une revue avec comité de lecture
Author
BOURHIS, Martin
ccPEREIRA, Michaël
DOBREV, Ivan
ccRAVELET, Florent
1003528 Laboratoire d'Ingénierie des Fluides et des Systèmes Énergétiques [LIFSE]

URI
http://hdl.handle.net/10985/21360
DOI
10.1016/j.expthermflusci.2021.110504
Date
2021
Journal
Experimental Thermal and Fluid Science

Abstract

Small horizontal axis wind turbines operating at low wind speeds face the issue of low performance compared to large wind turbines. A high amount of torque is required to start producing power at low wind speed to overtake friction of mechanical parts. A low design tip-speed ratio (λ) is suitable for low power applications. The relevance of the classical blade-element/ momentum theory, traditionally used for the design of large wind turbines operating at high tip-speed ratio, is controversial at low tip-speed ratio. This paper presents a new design methodology for a 300 mm horizontal axis wind turbine operating at very low tip-speed ratio. Chord and blade angle distributions were computed by applying the Euler’s turbomachinery theorem. The new wind turbine has multiple fan-type blades and a high solidity. The rotor was tested in wind tunnel. The power and torque coefficients have been measured, and the velocities in the wake have been explored by stereoscopic particle image velocimetry. The results are compared to a conventional 3-bladed horizontal axis wind turbine operating at higher tip-speed ratio λ = 3. The new wind turbine achieves a maximum power coefficient of 0.31 for λ = 1. The conventional wind turbine achieves similar performance. At low tip-speed ratio, the torque coefficient (Cτ) is higher for the new wind turbine than for the conventional one and decreases linearly with the tip-speed ratio. The high magnitude of torque at low tip-speed ratio allows it to have lower instantaneous cut-in wind speed (2.4 m.s−1) than the conventional wind turbine (7.9 m.s−1). The order of magnitude of the axial and tangential velocities in the near wake are closed to the design requirements. The current method could still be improved in order to better predict the profiles. The analysis of the wake shows that the new wind turbine induces a highly stable and rotating wake, with lower wake expansion and deceleration than the conventional one. This could be useful to drive a contra-rotating rotor.

Files in this item

Name:
LIFSE_ETFS_2021_BOURHIS.pdf
Size:
1.827Mb
Format:
PDF
Embargoed until:
2021-03-01
View/Open

Collections

  • Laboratoire Ingénierie des fluides Systèmes énergétiques (LIFSE)

Related items

Showing items related by title, author, creator and subject.

  • Numerical Assesment of a Small-Scale and Very Low Tip Speed Ratio Wind Turbine 
    Article dans une revue avec comité de lecture
    BOURHIS, Martin; DOBREV, Ivan; ccRAVELET, Florent; ccPEREIRA, Michaël (EDP Sciences, 2021)
    The aim of this paper is to study by CFD the performance and to characterize the velocity fields in the wake of an horizontal axis wind turbine. The design of this wind turbine is far from classical as it has been designed ...
  • Performance and flow characteristics of the optimum rotors of Betz, Joukowsky, and Glauert at low tip-speed ratio 
    Article dans une revue avec comité de lecture
    ccBOURHIS, Martin; ccPEREIRA, Michaël; ccRAVELET, Florent (AIP Publishing, 2022-10)
    The advent of the Internet of Things technology has led to a renewed interest in the use of low tip-speed ratio micro-scale wind turbines to supply power to battery-less microsystems. At low tip-speed ratio ( λ), the blade ...
  • Experimental investigation of the effects of the Reynolds number on the performance and near wake of a wind turbine 
    Article dans une revue avec comité de lecture
    ccBOURHIS, Martin; ccPEREIRA, Michaël; ccRAVELET, Florent (Elsevier BV, 2023-06)
    Wind tunnel experiments provide worthwhile insights for designing efficient micro wind energy harvesters and large-scale wind turbines. As wind tunnel tests with large-scale wind turbines are expensive and not always ...
  • Experimental investigation of the effect of the Reynolds number on the performance of a micro-scale and low tip-speed ratio wind turbine 
    Communication avec acte
    BOURHIS, Martin; ccRAVELET, Florent; ccPEREIRA, Michaël (2022)
    Micro-scale wind turbines are of great interest to supply rechargeable batteries of autonomous sensors in the field of the Internet Of Things (IOT). However, they face the issue of lower dimensionless performance than ...
  • Experimental investigation of the effect of blade solidity on micro-scale and low tip-speed ratio wind turbines 
    Article dans une revue avec comité de lecture
    BOURHIS, M.; ccRAVELET, Florent; ccPEREIRA, Michaël (Elsevier BV, 2023-01)
    It is well-established that micro-scale wind turbines require high blade solidity in order to overtake friction torque of all mechanical parts and starts operating. Therefore, multi-bladed micro-scale rotors with a low ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales