Electron beam fluorescence is a well established technique to perform local and non intrusive measurements of density, vibrational and rotational temperatures and velocity in a low density flow of nitrogen or air (/spl les/10/sup 16/ molecules.cm/sup -3/). This paper describes two recent applications (flow visualization and velocimetry) in low density hypersonic wind tunnels using a multi-purpose electron gun. Flow visualization, obtained by sweeping the electron beam to illuminate a sheet in the flow, is useful to follow density variations and expose shock waves. It is here applied to study interferences between shock waves issued from two models placed in a Mach 10 flow. Velocity measurements have also been carried out by using a pulsed electron beam to tag a flow with afterglowing plasma columns for optical time of flight detection.


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    Title :

    Diagnostics by electron beam fluorescence in hypersonics


    Contributors:
    Mohamed, A.K. (author) / Pot, T. (author) / Chanetz, B. (author)


    Publication date :

    1995-01-01


    Size :

    875498 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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