Год выпуска: 2010 Автор: Vijaykumar Ananthanarayanan Издательство: LAP Lambert Academic Publishing Страниц: 116 ISBN: 9783838388779
Описание
A new laser system has been developed to measure temperature and major species concentrations using dual-pump N2-CO2 coherent anti-Stokes Raman scattering (CARS). The second harmonic output from an injection-seeded Nd:YAG laser was used as one of the narrowband pump beams.The second narrowband pump beam was generated from an optical parametric oscillator injection-seeded at the idler wavelength using an external cavity diode laser.A broadband dye laser produced the Stokes beam. The three beams were focused between two opposing nozzles of a counter-flow burner facility to measure temperature and major species concentrations in a variety of partially premixed and non-premixed methane and hydrogen flames at atmospheric pressure. Sandia CARSFT code was used to conduct a least squares fit process. Temperature was obtained from fitting only the nitrogen spectrum at every measurement location. In general, excellent agreement was observed between measured temperature profiles and those...
