Spontaneous Raman scattering diagnostics of combustion

Nd:YAG laser is used as a spontaneous vibrational Raman scattering (SVRS) source in combustion diagnostics. Multiple species data are acquired from both mathane-air combustion and solid fuel combustion. Spatially resolved Raman scattering spectra are used to measure concentrations of all major species (N2, O2, H2O, CH4) in methane-air flames with different ratio of CH4 and air. Temperature of the flame is calculated by measuring the concentrations of all major species in flames, also by measuring the ratio of Stokes spectrum intensity and anti-Stokes spectrum intensity. Uncertainty of concentrations and temperature data is analyzed, too. Moreover, the technique is used to diagnose solid fuel combustion with single-pulse. The Raman spectra of major species（N2, H2CO, CH4, H2O）at different