Measuring and testing – Wind tunnel: aerodynamic wing and propeller study
Patent
1988-11-09
1990-01-30
Woodiel, Donald O.
Measuring and testing
Wind tunnel: aerodynamic wing and propeller study
2503561, G01M 900
Patent
active
048965324
ABSTRACT:
A laminar air flow is directed through a space and becomes turbulent upon encountering objects in the space. In order to enable the turbulence in the air flow to be visualized, laminar streams of a tracer gas are introduced into the laminar air flow in the same direction and approximately at the same velocity as the laminar air flow. The tracer gas is a gas such as nitrous oxide having a vibrational absorption frequency in the infrared range. A warm background is positioned at one side of the tracer gas streams and a filter-equipped infrared camera is positioned at the opposite side of the streams and is directed toward the warm background. The camera detects the flow pattern of the tracer gas and produces a permanent photographic image of such pattern.
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Thermal Surveys, Inc.
Woodiel Donald O.
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