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Title

Raman spectroscopy of hypersonic shock waves

AuthorsRamos, Ángel CSIC; Maté, Belén CSIC ORCID; Tejeda, Guzmán CSIC ORCID; Fernández Sánchez, José María CSIC ORCID ; Montero, Salvador CSIC ORCID
Issue DateOct-2000
PublisherAmerican Physical Society
CitationPhys. Rev. E 62, 4940–4945 (2000)
AbstractRaman 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.
Description6 pages, 6 figures.-PACS:47.40.Nm, 47.80.+v, 33.20.Fb
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevE.62.4940
URIhttp://hdl.handle.net/10261/23453
DOI10.1103/PhysRevE.62.4940
ISSN1063-651X
Appears in Collections:(CFMAC-IEM) Artículos

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