Retractable vortex generator

Abstract

A device and methods for low speed performance improvement of a lifting surface assembly (300) are disclosed. At least one vortex generator (308) is coupled to the lifting surface assembly, and the vortex generator is extended through the lifting surface assembly by drooping a hinged leading edge device (302) coupled to the lifting surface assembly to increase lift. The vortex generator is retracted inside the lifting surface assembly to decrease drag.

Description

technical field [0001] Embodiments of the invention generally relate to flow over a hydrodynamic surface. More specifically, embodiments of the present invention relate to retractable vortex generators for improving the hydrodynamic properties of flow over a hydrodynamic surface. Background technique [0002] Flow separation typically occurs when the boundary layer moves toward the leading edge of the lifting surface, and far enough away from the counterpressure gradient that the velocity of the boundary layer relative to the lifting surface drops to almost zero. The fluid flow separates from the lifting surface and then forms eddies and eddies instead. In aerodynamics, flow separation from time to time can lead to increased drag and decreased lift. Flow separation typically deteriorates low speed performance by causing boundary layer separation at high angles of attack. The degraded low speed performance in turn increases the "stall speed" of the lifting surface and may ...

AI Technical Summary

Problems solved by technology

Flow separation typically deteriorates low speed performance by causing boundary layer separation at high angles of attack

degraded low-speed performance in turn increases the "stall speed" of the lifting surface, and may result in suboptimal flight conditions when the lifting surface is operated at the low speeds associated with takeoff and approach to landing

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