151. Measurements in ablating air Teflon boundary layers
- Author
-
R. CENTER and J.H. CHANG
- Subjects
Materials science ,Atmospheric pressure ,business.industry ,Laminar flow ,Stagnation point ,Cylinder (engine) ,law.invention ,Boundary layer ,Optics ,Thermal radiation ,law ,Cathode ray ,business ,Freestream - Abstract
Theoretical descriptions of the detailed structure of an 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 that 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 subso nic air or nitrogen jets at 2500-4500°K and -^ atmospheric pressure. The state of the freestream was measured by the electron beam fluorescence technique.
- Published
- 1971
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