Measurements in Ablating Air Teflon Boundary Layers
AVCO EVERETT RESEARCH LAB INC EVERETT MA
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Theoretical descriptions of the detailed structure of ablating air- Teflon laminar boundary layer predict CF2 to be a major constituent in the boundary layer. This species has not been observed experimentally. This paper presents spectrally and spatially resolved UV thermal radiation measurements which demonstrate the presence of CF2 in the stagnation point boundary layer of ablating Teflon cylinder. The experiments were performed in an arc facility which provided subsonic air or nitrogen jets at 2500 to 4500K and 140 atmospheric pressure. The state of the freestream was measured by the electron beam fluorescence technique.
- Atomic and Molecular Physics and Spectroscopy