Vortex generators for inlets

Details Vortex generators for inlets Vortex generators for inlets

1986-07-14

1987-09-29

Barefoot, Galen

Aeronautics and astronautics

Aircraft power plants

244199, B64D 3302

Patent

active

046964428

ABSTRACT:
A pair of vortex generators are attached to the exterior surface of an aircraft and located forwardly of a flush inlet so as to effectively remove or reduce the thickness of a slower-moving boundary layer airflow ajdacent to the exterior aircraft surface and increase the mass airflow into the flush inlet. The pair of vortex generators induce higher mean total pressure airflow into the area between the vortex generators and downstream thereof and in front of to the flush inlet, thereby resulting in an increase in mass airflow into the flush inlet for a given inlet area. The vortex generators are of L or T-shape cross-section with the base of L or T-shape attached to the exterior surface of the aircraft; and in planform, the pair of vortex generators are angled rearwardly outwardly at a predetermined angle with respect to the direction of free stream airflow, or divergently, to generate counter-rotating vortices that trail outboard of the flush inlet and by the action of the rotational flow, induce more of the free stream airflow into the flush inlet. Generally, the free stream airflow is parallel to the exterior surface of the aircraft.

REFERENCES:
patent: 2694357 (1954-11-01), Lee
patent: 3099423 (1963-07-01), Wilde et al.

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