Nanoscale compact optical vortex generators promise substantially significant prospects in modern optics and photonics, leading to many advances in sensing, imaging, quantum communication, and optical manipulation. However, conventional vortex generators often suffer from bulky size, low vortex mode purity in the converted beam, or limited operation bandwidth. Here, we design and demonstrate gr...

Three vortex-generator configurations were installed aft of the inlet throat on the centerbody of a Mach 3 . 0 mixed-compression inlet. The three were about equal in im­ proving diffuser pressure recovery and all produced significant, although unequal, reduc­ tions in distortion. Only the most densely spaced configuration generated vortices that dissipated before reaching the compressor face. V...

This paper mainly researched on influence of vortex generator on lift coefficient and drag coefficient, when vortex generator is mounted on a flat plate. Vented cylinders were used as vortex generators which intensify vortex shedding in the wake of the vented cylinder as compared to base line circular cylinder which ensures more attached flow and increases lift force of the system. Firstly vent...

In this paper, we show that improved air circulation above a heat sink is possible using thin winglet-type vortex generators that can be passively retrofitted to an existing unit. By mounting these vortex generators on the leading edge of heat sink fins, pairs of counterrotating vortices are induced within the interfin spacing. The vortices disturb the boundary layers and serve to mix the air i...

Abstract The following work documents the effect of streamwise vortices generated at the nozzle exit of an axisymmetric air jet on the amount of mass entrained into an ejector. In an experimental analysis of the mass entrainment of circular jet ejectors, we found that the introduction of half delta wing vortex generators in the exit of the jet nozzle (Reynolds number of 50,000) increased the am...

A convex corner models the upper surface of a deflected flap and shock-induced boundary layer separation occurs at transonic speeds. This study uses micro-vortex generators (MVGs) for flow control. An array MVGs (counter-rotating vane type, ramp type co-rotating type) with height 20% thickness incoming is installed upstream corner. The pressure distributions are similar regardless presence MVGs...

Abstract The flow organisation of air-jet vortex generators (AJVGs) elliptical cross sections and their control effectiveness on a $$24^{\circ }$$ 24 ∘ -compression-ramp-induced shock-wave/boundary-layer interaction was analysed the basis experiments at $$M_{\infty } = ...