Arrangement for controlling the air flow over aerodynamic profil

Details Arrangement for controlling the air flow over aerodynamic profil Arrangement for controlling the air flow over aerodynamic profil

1985-08-21

1987-02-10

Barefoot, Galen

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

416 91, B64C 2102

Patent

active

046417990

ABSTRACT:
An arrangement for controlling the air flow past an aerodynamic profile, (such as an aerofoil surface of a wing, tail plane, or fuselage of an aircraft or missile, a propeller, helicopter rotor, or blading of a turbo-engine fan or wind impeller) by providing a number of orifices of small diameter spaced apart in the profile surface in the longitudinal direction of the profile transversely to the direction of air flow over the profile and to the chordwise direction of the profile. Fluid is either discharged or drawn in through the orifices perpendicularly to the air flow in the region of separation of laminar flow. The orifices have a coefficient of flow (i.e., either a discharge or an intake coefficient) C.sub.Q =(V/FV) of up to 10.sup.-4 for a Reynolds Number less than 3.times.10.sup.6, where v=volume flow of the fluid through the discharge orifices, F=profile area and V=velocity of the air stream flowing over the wing or blade. The invention is particularly concerned with controlling the air flow over an aerofoil profile of a wing of a slowly flying aircraft, such as a glider or light aircraft.

REFERENCES:
patent: 2833492 (1958-05-01), Fowler
patent: 3194518 (1965-07-01), Walsh
patent: 3262658 (1966-07-01), Reilly
patent: 3421577 (1969-01-01), Valyi
patent: 4033526 (1977-07-01), Benson
"Flight Experiments on Suction for High Lift", by M. R. Head et al., Jour of Aircraft, vol. 4, Mar./Apr. 1967, pp. 81-89.
"Low-Speed Flows Involving Bubble Separations", by Itiro Tani, Progress in Aeronautical Sciences, vol. 5, 1964, pp. 70-81.

Affiliated with

Also associated with

Rating

Arrangement for controlling the air flow over aerodynamic profil does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for controlling the air flow over aerodynamic profil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for controlling the air flow over aerodynamic profil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2359826