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Numerical study of longitudinal vein effects on the aerodynamic characteristics of a corrugated bio-airfoil

Vakilipour, S., Zarafshani, H. and Al-Zaili, J. ORCID: 0000-0003-4072-2107 (2021). Numerical study of longitudinal vein effects on the aerodynamic characteristics of a corrugated bio-airfoil. Computers & Fluids, 216, 104821. doi: 10.1016/j.compfluid.2020.104821

Abstract

The purpose of the present study is to investigate the influence of cross-sectional veins topology on the flow pattern and aerodynamic performance of a pitching corrugated bio-inspired airfoil. To demonstrate the vein effects, a cross-section of Ashena Cyanea wing is modelled with three configurations. The airflow passing bio-airfoil is subjected to three Reynolds numbers of 1000, 5000, and 14000 and selected reduced frequencies () and angular amplitude (). The results show that as the Reynolds number increases, the effects of veins structure become more significant. The lift coefficients of the three modelled bio-airfoils are almost identical over the range of selected Reynolds number. At the Reynolds numbers of 1000 and 5000, the thin bio-airfoil has a minimum drag coefficient, and the drag coefficients of thick and veined bio-airfoils are quite similar. The veins in the bio-airfoils increase the drag coefficient significantly for the Reynolds numbers of 14000 compared to the Reynolds number of 5000. Finally, the numerical simulations provide hysteresis of lift and drag coefficients subjected to an increment for Reynolds number, reduced frequency, and angular amplitude.

Publication Type: Article
Additional Information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords: Bio-inspired pitching airfoil, OpenFOAM, k SST-SAS, Lift and drag coefficients
Subjects: Q Science > QA Mathematics
T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Mechanical Engineering & Aeronautics
Date available in CRO: 27 Aug 2021 08:48
Date deposited: 27 August 2021
Date of acceptance: 14 December 2020
Date of first online publication: 16 December 2020
URI: https://openaccess.city.ac.uk/id/eprint/26668
[img] Text - Accepted Version
This document is not freely accessible until 16 December 2021 due to copyright restrictions.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

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