4. Laser and optical interferometry

K.A.Vereschagin, V.V. Smirnov, O.M. Stel’makh, V.I. Fabelinsky
A.M. Prokhorov General Physics Institute, IOFAN, Russia

CARS diagnostics of high-pressure high-temperature H2/O2 and CH4/O2 flames in a pulsed combustion chamber

In this work presented are the results of application of Coherent Anti-Stokes Raman Scattering (CARS) to the measurements of gas parameters in a pulsed combustion chamber specially designed for modeling of hydrogen- and hydrocarbon-oxygen combustion at high temperature (∼3500 K) and pressure (∼20 MPa). Besides temperature, pressure, and species relative concentration measurements together with temporal behavior, methodical aspects of CARS spectroscopy as a diagnostic tool were investigated from the point of view of proper choice of a probe molecule. Spectra evolution of selected probe molecules with pressure and temperature were analyzed.
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