The flap** flight of birds: Analysis and application

W Thielicke - 2014‏ - research.rug.nl
It was thought that the aerodynamics of flap** flight in birds is fully understood for quite
some time, but recent studies have shown that this is not the case. Bird flight uses …

A review of underwater bio-mimetic propulsion: cruise and fast-start

LM Chao, YH Cao, G Pan - Fluid Dynamics Research, 2017‏ - iopscience.iop.org
This paper reviews recent developments in the understanding of underwater bio-mimetic
propulsion. Two impressive models of underwater propulsion are considered: cruise and …

Characterization of bifurcated dual vortex streets in the wake of an oscillating foil

S Verma, A Hemmati - Journal of Fluid Mechanics, 2022‏ - cambridge.org
Wake evolution of an oscillating foil with combined heaving and pitching motion is evaluated
numerically for a range of phase offsets (pairs observed consistently for oscillating foils with …

Limit-cycle oscillations in unsteady flows dominated by intermittent leading-edge vortex shedding

K Ramesh, J Murua, A Gopalarathnam - Journal of Fluids and Structures, 2015‏ - Elsevier
High-frequency limit-cycle oscillations of an airfoil at low Reynolds number are studied
numerically. This regime is characterized by large apparent-mass effects and intermittent …

The influence of wing morphology on the three-dimensional flow patterns of a flap** wing at bird scale

W Thielicke, EJ Stamhuis - Journal of Fluid Mechanics, 2015‏ - cambridge.org
The effect of airfoil design parameters, such as airfoil thickness and camber, are well
understood in steady-state aerodynamics. But this knowledge cannot be readily applied to …

Validation of a discrete vortex method for low Reynolds number unsteady flows

P Hammer, A Altman, F Eastep - AIAA journal, 2014‏ - arc.aiaa.org
An in-house discrete vortex method code based on steady and unsteady thin airfoil theory is
used to rapidly resolve the flowfield and force coefficients for low Reynolds number …

Numerical investigation of dynamic stall reduction on helicopter blade section in forward flight by an airfoil deformation method

SMH Karimian, SV Aramian, A Abdolahifar - Journal of the Brazilian …, 2021‏ - Springer
In the present work, airflow over blade section of helicopter rotor in forward flight is
investigated numerically to offer a proposal for reduction or alleviation of dynamic stall on …

Uncertainty-Aware Surrogate Models for Airfoil Flow Simulations with Denoising Diffusion Probabilistic Models

Q Liu, N Thuerey - AIAA Journal, 2024‏ - arc.aiaa.org
Leveraging neural networks as surrogate models for turbulence simulation is a topic of
growing interest. At the same time, embodying the inherent uncertainty of simulations in the …

Numerical investigation of the dynamic stall reduction on the UAS-S45 aerofoil using the optimised aerofoil method

M Bashir, N Zonzini, SL Martel, RM Botez… - The Aeronautical …, 2024‏ - cambridge.org
This paper investigates the effect of the optimised morphing leading edge (MLE) and the
morphing trailing edge (MTE) on dynamic stall vortices (DSV) for a pitching aerofoil through …

Prediction of vortex initiation using an unsteady panel method with an integral-boundary-layer calculation

H Ramanathan, A Gopalarathnam - AIAA AVIATION 2022 Forum, 2022‏ - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2022-3897. vid In our current work, we
implement and evaluate the efficacy of a boundary layer parameter (H_32) based low-order …