A vortex generator (VG) is an aerodynamic device, consisting of a small vane usually attached to a lifting surface (or airfoil, such as an aircraft wing) [1] or a rotor blade of a wind turbine. [2] VGs may also be attached to some part of an aerodynamic vehicle such as …

Apr 1, 2024 · Here we show a new strategy for vortex generation at the nanoscale that surpasses single-pixel phase control. We reveal that interaction between neighbouring nanopillars of a meta-quadrumer can...

Aug 18, 2017 · Using a spiral phase plate, with the thickness increasing with azimuthal angles (see the figure, panel A) is a classic approach to obtain a spiral phase distribution necessary for vortex beams. Nevertheless, to make a smooth helical surface with desired precision remains a …

This article reviews recent progress leading to the generation of optical vortex beams. After introducing the basics of optical vortex beams and their promising applications, we summarized different approaches for optical vortex generation by discrete components and laser cavities.

Mar 3, 2025 · The vortex generator was designed to create controlled vortices. These are mixed with high-energy free-stream air with slower-moving air in the boundary layer. The point of this is to prevent flow separation and improves aerodynamic performance.

Apr 2, 2025 · d Measured intensities (top) and interference patterns (bottom) of on-demand vortex generation from the metasurface, where m is the topological charge. The figures are reproduced from ref. 17.

Feb 26, 2018 · This chapter is focused on vortex detection, generation, and characterization. There are many ways to generate and characterize vortex; this chapter is focused on two techniques to generate a vortex, with fixed surface, often …

A vortex generator (also called VG) is a device that initiates and maintains vortex motion in fluid flow. However, the term usually applies to devices that generate localized vortices on a lifting surface to improve the airflow over them.

Vortex generators within a streamline-traced, external-compression supersonic inlet for Mach 1.66 were investigated to determine their ability to increase total pressure recovery and reduce total pressure distortion.

May 28, 2015 · A scheme for generating intense vortex beams in the extreme ultraviolet that carry high values of orbital angular momentum (OAM) has been unveiled by scientists in China.