Quantitative Temperature Measurement of High Pressure CH$_{4}$/O$_{2}$/N$_{2}$ Laminar Flames Using Laser Induced Thermal Grating Spectroscopy (LITGS)

摘要: Laser diagnostics for quantitative measurements of temperature are important in high pressure and environments. In this study, Induced Thermal Grating Spectroscopy (LITGS) is employed oxygen enriched CH$_{4}$/O$_{2}$/N$_{2}$ laminar flames at elevated pressure. The wavelength the pump beam was set OH excitation. LITGS a promising laser diagnostic because magnitude signal increases with due to higher quench rates stronger density perturbations more dense mixtures. As result, can be successfully acquired 0.5 MPa various equivalence ratios. derived close adiabatic flame temperatures each condition maximum than 2600 K. Therefore, also flames, such as rocket motors.