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The subject of the work is the detailed statistical analysis of stratified and sheared flames. For this purpose, a generic, premixed, piloted burner is used, which enables stratification and shearing of the fuel-oxidizer mixtures that emerge through two independent annular gaps. To ensure that the processes that occur remain unaffected, laser-based methods are used to investigate them. The detailed characterization of the burner is carried out using thermographic phosphors to determine the wall temperatures. Combined Raman/Rayleigh spectroscopy is used for...

In technical combustion processes, the interaction of the flame with the turbulent flow field plays a crucial role in the stability, safety and efficiency of energy conversion. Turbulent combustion is a three-dimensional multiscale phenomenon. In the operation of technical burners, transient combustion states such as spark and self-ignition, flame extinction and flashback can also occur. To investigate these phenomena, imaging laser-optical measurement methods are developed in this work and simultaneously applied to the measurement of transient flames in a turbulent...