Optimization of a columnar vortex generator installed over an aircraft carrier ski-jump ramp

Abstract

Aircraft performances over aircraft carriers are essential in modern navies. Take-off operation is critical due to the short runway available. The ski-jump ramp is a useful system that allows to operate under safe conditions. However, the sharp edge at the end of the runway provokes a region with recirculation bubble and low velocity producing strong flow disturbances. Hence, the aircraft performances are affected and the pilot’s workload is augmented. Previous researches showed that columnar vortex generator reduces the recirculation bubble generated over the end of flight deck. This article presents an in-depth experimental study performed by wind tunnel testing in order to determine the relation between the columnar vortex generator size and the recirculation bubble reduction. Particle image velocimetry is used to investigate the flow field velocity and flow structure around the ski-jump ramp as a non-intrusive experimental technique. Encouraging results were found for the biggest columnar vortex generator studied.

Insight into the factors affecting the safety of take-off and landing of the ship-borne helicopter

“…Czerwiec 67 LHA Bow-flap Shafer 64 DDG-81 Porous surfaces, different fence, and blowing Landman 68 LHD Flap and columnar vortex generator (CVG) Findlay 69 DDG-81 Eleven different configurations of fences Greenwell 70 SFS Eight different configurations of inclined screen Kääriä 71 SRF Different side-flap configurations and hangar notch Forrest 65,66 SFS2 Five different modifications including chamfer, flap, tabs, saw-tooth, and cylinder Kääriä 72 SRF Side-flap and hangar notch Kääriä 1 SRF Six windward hangar side-face modifications Mora 73 SFS Four configurations with different hangar roof curvature Mora 74 SFS Active plasma flow control technique with two configurations Bardera 75 Aircraft carrier Cylinder, triangular-notched fence and CVG Bardera 76 Aircraft carrier Different configurations of flat plate, cylinder, and CVG Bardera 77 Aircraft carrier CVG with two angles Matias 78 SFS2 Trapezoidal vortex generator, suction, and blowing Bardera 79 Aircraft carrier CVGs with five spiral parameters one rotor diameter. For medium-weight helicopters, it is usually around 30 m. The NORSTOCK Standard C-004 for the offshore helicopter 83 puts forward the similar requirements to CAP 437.…”