Analysis of Combustion Efficiency Using Laser-Induced Fluorescence Measurements of OH-Radicals

To transform metals high temperatures are usually needed. A fast and efficient heating can reduce the CO2 emitted. The fastest way to heat metals is called direct flame impingement (DFI). The flame impinges upon the item being heated. For this method it is important to know the shape and length of the flame. Laser-induced fluorescence (LIF) technology allows measurements of a two-dimensional field without influencing the reaction or the flow. Commonly used is the measurement of OH-radicals, an indicator of the reaction zone. In the presented study measurements of a turbulent diffusion flame are shown. The position of the reaction zone and the influence of the distance between the item being heated and the burner are investigated. Conventional measurements and LIF-measurements are compared and the potential of DFI to increase the efficiency of heating metals is discussed.