Continuous coloured smoke-wire technique for flow visualisation

Mathur, NB and Ramesh, G and Yajnik, KS (1988) Continuous coloured smoke-wire technique for flow visualisation. Journal of Aeronautical Society of India, 40. pp. 131-137.

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Abstract

Continuous colored smoke-wire technique has been developed for flow visualization in wind tunnels. The improved contrast of colored smoke sheet facilitates flow visualization. In the present technique, a vertical smoke-wire is used for introducing controlled sheets of smoke streaklines during a wind tunnel run. Regulated drops of a mixture of paraffin oil with colored dye are allowed to fall along the stainless steel wire. The wire is thus coated with a thin film of falling paraffin or with minute colored droplets along the length. The oil mixture subsequently evaporates through the resistive heating of the wire thus producing a sheet of colored streaklines. The present technique has been used in the NAL 0.9m low speed wind tunnel for flow visualization around the wing of an aircraft configuration and also a delta wing model at high incidence.

Item Type: Article
Additional Information: Copyright for this article belongs to Aeronautical Society of India
Uncontrolled Keywords: Color photography;Flow visualisation;Smoke-trails;Low speed wind tunnels;Streak cameras;Wind tunnel models
Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
AERONAUTICS > Aeronautics (General)
Depositing User: Users 90 not found.
Date Deposited: 22 Jan 2008
Last Modified: 07 Jun 2010 10:36
URI: http://nal-ir.nal.res.in/id/eprint/4373

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