Continous colouhed smoke-wire technique for flow visulisation in wind tunnels

Mathur, NB and Ramesh, G and Karunakaran, KM and Yajnik, KS (1986) Continous colouhed smoke-wire technique for flow visulisation in wind tunnels. Technical Report. National Aeronautical Laboratory, Bangalore,India.

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    Abstract

    A continuous coloured smoke-wire technique has been developed for flow visualisation in wind tunnels. The improved contrast of coloured smoke sheet facilitates flow visualisation. In the present technique, a vertical smoke-wire is used for introducing controlled sheets of smoke streaklines during a wind tunnel run. Regulated drops13; of a mixture of paraffin oil with coloured 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 coloured droplets along the length.The oil mixture subsequently evaporates through the resistive heating13; of the wire thus producing a sheet of coloured treaklines. The present technique has been used in the NAL 0.9m low speed wind tunnel for flow visualisation around the wing of an aircraft configuration and also a delta wing model at high incidence.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Smoke-wire;Flow Visualisation;Continuous wind tunnel;Colour Aircraft Flow Delta Wing.13; -
    Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
    Division/Department: Flight Mechanics and Control Division, Flight Mechanics and Control Division, Flight Mechanics and Control Division, Flight Mechanics and Control Division
    Depositing User: M/S ICAST NAL
    Date Deposited: 03 Oct 2006
    Last Modified: 24 May 2010 09:51
    URI: http://nal-ir.nal.res.in/id/eprint/2832

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