Flapping rotary wing: A novel low-Reynolds number layout merging bionic features into micro rotors

L Chen, C Cheng, C Zhou, Y Zhang, J Wu - Progress in Aerospace …, 2024 - Elsevier
Since the birth of bio-inspired flapping-wing micro air vehicles, a controversial topic, ie,
whether and to what extent a flapping wing can outperform conventional micro rotors, has …

Leading-edge vortex dynamics on plunging airfoils and wings

O Son, AK Gao, I Gursul, CD Cantwell… - Journal of Fluid …, 2022 - cambridge.org
The vortex dynamics of leading-edge vortices on plunging high-aspect-ratio (AR= 10) wings
and airfoils were investigated by means of volumetric velocity measurements, numerical …

Coherence of unsteady wake of periodically plunging airfoil

B Turhan, Z Wang, I Gursul - Journal of Fluid Mechanics, 2022 - cambridge.org
We present an experimental investigation of the flow structure in the near wake of a
NACA0012 airfoil plunging sinusoidally at a chord Reynolds number of Re= 20 000 and for …

Influence of turbulence on cambered and symmetrical airfoils at low Reynolds numbers

NJ Kay, PJ Richards, RN Sharma - AIAA journal, 2020 - arc.aiaa.org
Small unmanned aerial vehicles (UAVs) are becoming more common as electronic systems
decrease in size and weight. These aircraft fly below a Reynolds number of 250,000, where …

[HTML][HTML] Effect of wing planform on plunging wing aerodynamics

O Son, Z Wang, I Gursul - Journal of Fluids and Structures, 2023 - Elsevier
The unsteady aerodynamics of three plunging wings with different planform shapes was
investigated in water tunnel experiments by means of force/moment and three-dimensional …

Flapping wing propulsion: Comparison between discrete vortex method and other models

TM Faure, K Roncin, B Viaud, T Simonet, L Daridon - Physics of Fluids, 2022 - pubs.aip.org
Cetacean propulsion by a periodic flapping motion of their fluke is considered and studied
on a benchmark flexible straight wing. The aim of the study was to validate low-order models …

Three-dimensionality of leading-edge vortices on high aspect ratio plunging wings

N Chiereghin, S Bull, DJ Cleaver, I Gursul - Physical Review Fluids, 2020 - APS
To investigate the effect of sweep on the leading-edge vortex of high aspect ratio plunging
wings, this article presents force, bending moment, and volumetric velocity measurements …

Unsteady aerodynamics of a wing in a novel small-amplitude transverse gust generator

F Fernandez, D Cleaver, I Gursul - Experiments in Fluids, 2021 - Springer
A novel small-amplitude high-frequency gust generator has been developed that works by
oscillating a small fence on the wind tunnel wall. The gust generator produces …

The effect of dynamic twisting on the flow field and the unsteady forces of a heaving flat plate

C Soto, S Bhattacharya - Bioinspiration & Biomimetics, 2023 - iopscience.iop.org
Many marine animals can dynamically twist their pectoral fins while swimming. The effects of
such dynamic twisting on the unsteady forces on the fin and its surrounding flow field are yet …

Lift generation mechanism of the leading-edge vortex for an unsteady plate

ZY Li, LH Feng, T Wang, Y Liang - Journal of Fluid Mechanics, 2023 - cambridge.org
The lift generation mechanism of leading-edge vortex (LEV) in the case of a pitching and
plunging plate is studied using an experimental approach and the improved discrete vortex …