Continuous coloured smoke-wire technique for flow visualisation

Mathur, N. B. ; Ramesh, G. ; Yajnik, K. S. (1988) Continuous coloured smoke-wire technique for flow visualisation Journal of the Aeronautical Society of India, 40 . pp. 131-138. ISSN 0001-9267

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A 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
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ID Code:93710
Deposited On:23 Jun 2012 13:59
Last Modified:23 Jun 2012 13:59

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