Measuring and testing – Wind tunnel: aerodynamic wing and propeller study
Patent
1990-08-09
1992-03-31
Woodiel, Donald O.
Measuring and testing
Wind tunnel: aerodynamic wing and propeller study
G01M 900
Patent
active
050996851
ABSTRACT:
A wind tunnel having a test section and a fan section, interconnected by two passageways to form a recirculating air flow through said sections. There is a diffuser immediately downstream of the test section, and a second diffuser immediately downstream of the fan section. Each diffuser has an intermediate flow section where the side wall extends radially outwardly in a downstream direction at a relatively sharp angle. At the upstream end of the intermediate section there is a peripheral suction slot to draw in boundary layer air, and a by-pass passageway to discharge the air tangentially in a downstream location of the diffuser. This enables a substantial reduction in air velocity in a relatively short axial length.
REFERENCES:
patent: 2709917 (1955-06-01), Bruynes
patent: 2729974 (1956-01-01), Lee et al.
patent: 2948148 (1960-08-01), D'Anfreville et al.
patent: 3000401 (1961-09-01), Ringles
patent: 3049005 (1962-08-01), Frenzel
patent: 3981144 (1976-09-01), Milling et al.
patent: 3998393 (1976-12-01), Petty
patent: 4515524 (1985-05-01), Fisher, Jr.
"Incompressable Aerodynamics", by D. Thwarites, published by Dover Publications, Inc. New York 1958.
"Integrated Hull Design, boundary-layer Control & Propulsion of submerged Bodies: Wind tunnel Verification", AIAA Paper 82-1204 SIAA/SAE.ASME 18th Joint Propulsion Conference, Jun. 1982.
Separation Control by Trapped Vortices, by F. O. Rinegloeb, published in "Boundary Layer and Flow Control", G. V. Lockmann, editor, Pergamon Press, 1984.
"Tests in the N.P.L. Electric Tank of a 4:1 Axi-symmetrical Diffuser Having a Discontinuity in the Wall Velocity", by F. Cheers, and W. G. Rayner, published 1950 by London: His Majesty's Stationary office.
"An Improved Design Method & Experimental Performance of Two Dimensional Curved Wall Diffusers", by Tah-Teh Yang, W. G. Hudson & Ali M. El-Nashar of Clemsen University--Designated No. CR121024, Nov. 20, 1972.
McLean James D.
Sullivan Peter P.
The Boeing Company
Woodiel Donald O.
LandOfFree
Boundary layer control diffuser for a wind tunnel or the like does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Boundary layer control diffuser for a wind tunnel or the like, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boundary layer control diffuser for a wind tunnel or the like will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2250651