A preliminary version of this paper was presented at the AIAA Aviation 2020 forum (Paper 2020-2525).This provides an insight into grid generated turbulence for aeroacoustic studies. Several passive grids square bars were tested in open-jet facility University Bristol. The geometric properties and their position within tunnel contraction nozzle varied to quantify influence on average statistical...

A numerical implementation of the advection equation is proposed to increase the temporal resolution of PIV time series. The method is based on the principle that velocity fluctuations are transported passively, similar to Taylor's hypothesis of frozen turbulence. In the present work, the advection model is extended to unsteady three-dimensional flows. The main objective of the method is that o...

The encounter between micro-aerial vehicles (MAVs) and gusts is often detrimental mitigating the effects of gust important for operating MAVs under severe environmental conditions. This study investigates impact vertical on stationary oscillating NACA0012 (National Advisory Committee Aeronautics) airfoils at low Reynolds numbers using high-order computational fluid dynamics methods, identifies ...

In this paper, direct numerical simulations are performed for low-speed flows past a NACA0012 aerofoil at high incidence angles. The aim is to investigate the significance of quadrupole noise generated due separated shear layers, in comparison dipole emanating from surface. two different components (dipole and quadrupole) calculated by using Ffowcs Williams & Hawkings method approaches: one...

Wingtip vortex flow is of great importance because of its effect on practical problems such as landing separation distances for aircraft, blade/vortex interactions on helicopter blades, and propeller cavitations on ships. Extensive investigations have been conducted to improve the understanding of the tip vortex structure and its dissipation or persistence analytically, numerically, and experim...

To alleviate the computational burden associated with fluid dynamics (CFD) simulation stage and improve aerodynamic optimization efficiency, this work develops an innovative procedure for airfoil shape optimization, which is implemented through coupling genetic algorithm (GA) optimizer coefficients prediction network (ACPN) model. The ACPN established using a fully connected neural geometry as ...