OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 33 — Nov. 20, 2000
  • pp: 6243–6256

Development of high-resolution N2 coherent anti-Stokes Raman scattering for measuring pressure, temperature, and density in high-speed gas flows

Mark A. Woodmansee, Robert P. Lucht, and J. Craig Dutton  »View Author Affiliations


Applied Optics, Vol. 39, Issue 33, pp. 6243-6256 (2000)
http://dx.doi.org/10.1364/AO.39.006243


View Full Text Article

Enhanced HTML    Acrobat PDF (274 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Mean and instantaneous measurements of pressure, temperature, and density have been acquired in an optically accessible gas cell and in the flow field of an underexpanded sonic jet by use of the high-resolution N2 coherent anti-Stokes Raman scattering (CARS) technique. This nonintrusive method resolves the pressure- and temperature-sensitive rotational transitions of the ν = 0 → 1 N2Q-branch to within Δω = 0.10 cm-1. To extract thermodynamic information from the experimental spectra, theoretical spectra, generated by a N2 spectral modeling program, are fit to the experimental spectra in a least-squares manner. In the gas cell, the CARS-measured pressures compare favorably with transducer-measured pressures. The precision and accuracy of the single-shot CARS pressure measurements increase at subatmospheric conditions. Along the centerline of the underexpanded jet, the agreement between the mean CARS P/ T/ρ measurements and similar quantities extracted from a Reynolds-averaged Navier–Stokes computational fluid dynamic simulation is generally excellent. This CARS technique is able to capture the low-pressure and low-temperature conditions of the M = 3.4 flow entering the Mach disk, as well as the subsonic conditions immediately downstream of this normal shock.

© 2000 Optical Society of America

OCIS Codes
(280.2490) Remote sensing and sensors : Flow diagnostics
(300.6420) Spectroscopy : Spectroscopy, nonlinear
(300.6450) Spectroscopy : Spectroscopy, Raman

History
Original Manuscript: March 16, 2000
Revised Manuscript: August 4, 2000
Published: November 20, 2000

Citation
Mark A. Woodmansee, Robert P. Lucht, and J. Craig Dutton, "Development of high-resolution N2 coherent anti-Stokes Raman scattering for measuring pressure, temperature, and density in high-speed gas flows," Appl. Opt. 39, 6243-6256 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-33-6243

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited