Simultaneous temperature and relative O 2 –N 2 concentration measurements by single-shot pure rotational coherent anti-Stokes Raman scattering for pressures as great as 5 MPa

摘要: Dual-broadband pure rotational coherent anti-Stokes Raman scattering is a valuable nonintrusive tool for gas diagnosis that provides simultaneous and time-resolved information about temperature relative species concentration. A systematic investigation of single-shot precision accuracy measurement O(2)/N(2) concentration presented. Various O(2) concentrations (1.0-15.6%) in binary mixtures with N(2) have been investigated range from 300 to 773 K pressures 1-50 bars (0.1-5 MPa). comparison two least-sum-squared differences fit evaluation procedures the spectral shape, weighted constantly or inversely respect signal intensity, given. The results yielded good measuring as well influence temperature, concentration, pressure, techniques on both discussed.