Fluid velocity measurement instrument

Details Fluid velocity measurement instrument Fluid velocity measurement instrument

1989-11-08

1991-01-22

Woodiel, Donald O.

Measuring and testing

Volume or rate of flow

Thermal type

73 3, 7320426, G01F 168, G01F 2500

Patent

active

049861220

ABSTRACT:
A method and apparatus is provided to measure in fluids including suspensions and heterogeneous mixtures time-resolved histories of velocity magnitude and vector of unidirectional, unsteady and oscillating flows. A boundary layer develops from a sharp, leading edge of a plate approached by fluid flow. Its skin friction, measured at a fixed location on the plate by a hot-film sensor connected to a constant-temperature anemometer, is uniquely related to the magnitude of the approach velocity. Temperature-sensing gauges within the range of the thermal wake from the skin friction sensor allow to determine direction of the flow.

REFERENCES:
patent: 4214478 (1980-07-01), Lauterbach
patent: 4304130 (1981-12-01), Peter et al.
patent: 4399697 (1983-08-01), Kohama et al.
patent: 4843882 (1989-07-01), Ohta et al.
patent: 4870860 (1989-10-01), Ohta et al.

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