Journal ArticleDOI
Dual-pump coherent anti-Stokes Raman scattering measurements of nitrogen and oxygen in a laminar jet diffusion flame
TLDR
Results indicate that there is a region below the nozzle exit where significant amounts of oxygen are found on the fuel side of the peak flame temperature profile of a hydrogen-nitrogen jet diffusion flame.Abstract:
Dual-pump coherent anti-Stokes Raman scattering (CARS) has been demonstrated for the simultaneous measurement of gas-phase temperature and concentrations of molecular nitrogen and oxygen. A polarization technique was used to vary the relative intensities of the two CARS signals and expand the dynamic range of the relative concentration measurements. Detailed temperature and oxygen mole fraction measurements were performed in the stabilization region of a hydrogen-nitrogen jet diffusion flame. These results indicate that there is a region below the nozzle exit where significant amounts of oxygen are found on the fuel side of the peak flame temperature profile.read more
Citations
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Journal ArticleDOI
Recent advances in coherent anti-Stokes Raman scattering spectroscopy: Fundamental developments and applications in reacting flows
TL;DR: In this article, the authors provide an overview of recent progress in ns-, ps-, and fs-CARS spectroscopy for gas-phase thermometry and species-concentration measurements since the second edition of A.C. Eckbreth's book entitled Laser Diagnostics for Combustion Temperature and Species.
Journal ArticleDOI
Coherent anti-Stokes Raman scattering: Spectroscopy and microscopy
TL;DR: In this paper, the nonlinear susceptibility of the investigated molecule induced by pump and Stokes laser beams employed in the CARS technique is discussed, and the relation between the non-linear susceptibility, the different CARS laser intensities and the phase matching condition between them is also presented.
Journal ArticleDOI
Temperature and CO2 concentration measurements in the exhaust stream of a liquid-fueled combustor using dual-pump coherent anti-Stokes Raman scattering (CARS) spectroscopy
TL;DR: In this article, single-shot, dual-pump coherent anti-Stokes Raman scattering (CARS) measurements of N 2 and CO 2 were performed in the exhaust stream of a swirl-stabilized JP-8-fueled combustor under sooting conditions.
Journal ArticleDOI
Dual-Pump Coherent Anti-Stokes Raman Scattering Measurements in a Supersonic Combustor
TL;DR: The dual-pump coherent anti-Stokes Raman scattering (CARS) method was used to measure temperature and the mole fractions of N 2 and O 2 in a supersonic combustor.
Journal ArticleDOI
Determination of temperatures and fuel/air ratios in an ethene–air flame by dual-pump CARS
TL;DR: In this article, a dual-pump coherent anti-Stokes Raman spectroscopy (CARS) technique was used for simultaneous determination of temperature and ethene, oxygen and nitrogen concentrations.
References
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Computer Program for Calculation of Complex Chemical Equilibrium Compositions and Applications II. Users Manual and Program Description. 2; Users Manual and Program Description
Bonnie J. McBride,Sanford Gordon +1 more
Computer Program for Calculation of Complex Chemical Equilibrium Compositions, Rocket Performance, Incident and Reflected Shocks, and Chapman-Jouguet Detonations
Sanford Gordon,Bonnie J. McBride +1 more
TL;DR: Computer program is described for numerical solution of chemical equilibria in complex systems by using nonlinear algebraic equations using free-energy minimization technique.
Journal ArticleDOI
Coherent anti-Stokes Raman spectroscopy
TL;DR: In this article, the authors showed that the density-squared signal dependence becomes linear due to coherent mixing with an intense solvent Raman mode or the third-order background signal, which is useful for biological compounds where background fluorescence is a problem for conventional spontaneous Raman studies.
Journal ArticleDOI
On the possibility of measuring gas concentrations by stimulated anti‐Stokes scattering
P. R. Régnier,J. P.‐E. Taran +1 more
TL;DR: In this article, a very sensitive method for gas concentration measurements is proposed, where intense light scattering is obtained through a stimulated interaction, which appears more practical than spontaneous Raman scattering for gas flow analysis with fine spatial resolution.