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.
Diagnostics by electron beam fluorescence in hypersonics
01.01.1995
875498 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Diagnostics by Electron Beam Fluorescence in Hypersonics
British Library Conference Proceedings | 1995
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British Library Conference Proceedings | 1994
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