TEMPERATURE AND CONCENTRATION MEASUREMENTS BY CARS IN COUNTERFLOW LAMINAR DIFFUSION FLAMES

The combination of broadband CARS thermometry on nitrogen with the nar rowband technique, for detection of a second major species, is applied to counterflow laminar propane-air diffusion dames. Temperature profi les are measured for various conditions of strain and equivalence rati o. Comparisons with 1D calculations of the flow with a detailed kineti c mechanism are satisfactory. Some measurements of CO concentrations a re performed. Feasability of temperature measurements when the propane is replaced by liquid fuel (heptane) is demonstrated.