Measurement of waves in flows across a surface

Details Measurement of waves in flows across a surface Measurement of waves in flows across a surface

1990-08-16

1992-08-11

Woodiel, Donald O.

Measuring and testing

Wind tunnel: aerodynamic wing and propeller study

73178R, 73180, G01M 900

Patent

active

051368811

ABSTRACT:
A method and apparatus for sensing wave flow across a surface wherein at least two pressure levels are sensed and combined to provide a representation of waves within the flow. In the preferred embodiment holes bored through the aircraft surface at an interval of one-half the wavelength of the flow being measured introduce pressure perturbations into a cavity so they may acoustically interfere. The interfering waveform is sensed by at least one microphone disposed in the cavity.

REFERENCES:
patent: 2551526 (1951-05-01), Campbell
patent: 2871698 (1959-02-01), Bagby
patent: 3452707 (1969-07-01), Warren
patent: 3620069 (1971-11-01), Cole, Jr.
patent: 4188823 (1980-02-01), Hood
patent: 4372157 (1983-02-01), Caruthers et al.
patent: 4459851 (1984-07-01), Crostack
patent: 4463453 (1984-07-01), Cohen et al.
patent: 4524620 (1985-06-01), Wright et al.
patent: 4738137 (1988-04-01), Sugg et al.
J. M. Kendall "Experimental Study of Disturbance produced in a pretransitional laminar boundary layer by weak freestream turbulence" AIAA--pp. 1-10.
W. Nitsche et al. "Investigations on flow instabilities on airfoils by means of piezofoil-arrays (wind tunnel and flight tests)"--Institut fur Luft und Taumfahrt Technische Unicersitat Berlin--pp. 1-7.
N. S. Dougherty, Jr. et al.--"Boundary--layer transition on a 10-DEG Cone: wind tunnel/flight correlation"--AIAA--pp. 1-6.
A. Demetriades--"Pressure fluctuations on hypersonic vehicles due to boundary-layer instabilities"--Montana State University, Bozeman, Mont. pp. 188-190.
J. M. Kendall "Boundary Layer Receptivity to Freestream Turbulence" AIAA--pp. 1-7--Jun. 18-20, 1990.

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