CHARACTERIZATION OF TURBULENT H-2 N-2 AIR-JET DIFFUSION FLAMES BY SINGLE-PULSE SPONTANEOUS RAMAN-SCATTERING

A spontaneous Raman scattering apparatus based on a flashlamp-pumped d ye laser has been developed for single-pulse temperature and concentra tion measurements of very high accuracy. Comprehensive data sets from measurements in two turbulent H-2/N-2/air jet diffusion flames are pre sented comprising mean values and fluctuations of the temperature and major species concentrations. Differences in the behaviour of an attac hed and lifted flame, operated under identical flow conditions and fue l composition, are shown. The effect of differential diffusion and its dependence on flow velocity are investigated in detail. One of the ma in aims of this work is the establishment of data sets which are suita ble for testing mathematical dame models. As an example, the experimen tal results from one flame are compared to theoretical predictions fro m a Reynolds-Stress model.