INSTANTANEOUS PROFILES AND TURBULENCE STATISTICS OF SUPERSONIC FREE SHEAR LAYERS BY RAMAN EXCITATION PLUS LASER-INDUCED ELECTRONIC FLUORESCENCE (RELIEF) VELOCITY TAGGING OF OXYGEN
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abstract
A new method of flow tagging based on the vibrational excitation of oxygen is applied to both supersonic and high-speed subsonic air flows to generate instantaneous velocity profiles and turbulence statistics across the free shear layer. By simultaneously tagging two lines, both transverse and streamwise velocity correlations are found. Rayleigh scattering can also be imaged, so this flow diagnostic technique has the capability of instantaneously recording density cross sections and velocity profiles. 1989 Springer-Verlag.