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Model for sectional leading-edge vortex lift for the prediction of rotating samara seeds performance

Published online by Cambridge University Press:  05 May 2020

D. Rezgui Open the ORCID record for D. Rezgui [Opens in a new window] ,
I.H. Arroyo  and
R. Theunissen
D. Rezgui*
Affiliation:
Department of Aerospace Engineering, University of Bristol, Queen’s Building, Bristol, BS8 1TR, UK
I.H. Arroyo
Affiliation:
Space Centre, Skolkovo Institute of Science and Technology, Moscow Region, 121205, Russia
R. Theunissen
Affiliation:
VITO, Boerentang 200, 2400Mol, Belgium
*
[email protected]
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Abstract

This article presents a development of a simple analytical aerodynamic model capable of describing the effect of leading-edge vortices (LEVs) on the lift of rotating samara wings. This analytical model is based on the adaptation of Polhamus’ method to develop a sectional two-dimensional lift function, which was implemented in a numerical blade element model (BEM) of a rotating samara blade. Furthermore, wind tunnel experiments were conducted to validate the numerical BEM and to assess the validity of the newly developed analytical lift function. The results showed good agreement between the numerical model and the experimental measurements of rotational speed and rate of descent of the samara wing. The results were also compared with numerical predictions using BEM but adopting different lift coefficient expressions available in literature. This research contributed towards efficient aerodynamic modelling of the lift generated by LEVs on rotating samara wings for performance prediction, which could potentially be used in the design of bio-inspired rotary micro-air vehicles.

Keywords

samaraleading edge vortexautorotatingPolhamusblade element model
Type
Research Article
Information
The Aeronautical Journal , Volume 124 , Issue 1278 , August 2020 , pp. 1236 - 1261
Copyright
© The Author(s) 2020. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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