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Título: | Raman spectroscopy of hypersonic shock waves |
Autor: | Ramos, Ángel CSIC; Maté, Belén CSIC ORCID; Tejeda, Guzmán CSIC ORCID; Fernández Sánchez, José María CSIC ORCID ; Montero, Salvador CSIC ORCID | Fecha de publicación: | oct-2000 | Editor: | American Physical Society | Citación: | Physical Review E 62, 4940–4945 (2000) | Resumen: | Raman spectroscopy is shown to be an efficient diagnostic methodology for the study of hypersonic shock waves. As a test, absolute density and rotational population profiles have been measured across five representative normal shock waves of N2 generated in a free jet, spanning the Mach number range 7.7<M<15.3. The interconversion of three differentiated populations (cold, scattered, and rethermalized molecules) across these shock waves shows a largely bimodal rotational distribution function with additional contribution of scattered molecules, in close analogy with the velocity distribution function known from helium shock waves [G. Pham-Van-Diep et al., Science 245, 624 (1989)]. Quantitative data on invariance trends of density profiles and properties of the wake beyond the shock waves are reported. | Descripción: | 6 pags., 6 figs. -- PACS:47.40.Nm, 47.80.+v, 33.20.Fb | Versión del editor: | http://dx.doi.org/10.1103/PhysRevE.62.4940 | URI: | http://hdl.handle.net/10261/23453 | DOI: | 10.1103/PhysRevE.62.4940 | ISSN: | 1063-651X |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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PRE62-4940.pdf | 106,32 kB | Adobe PDF | Visualizar/Abrir |
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