In addition to the fundamental validation experiments for reaction kinetics at DLR-VT (laminar flame speeds, ignition delay times) speciation data provides an ambitious test case for reaction mechanism. For this purpose a high temperature flow reactor is used for mass spectrometric studies of gas phase reactions at controlled conditions.
High diluted, cold reactants are fed premixed to the Reactor in order to suppress a self-sustaining combustion reaction while gas composition is determined by MBMS at the reactors exhaust. This composition can be used for validation and development of kinetic reaction models in combination with the known (measured) temperature and velocity profiles. Variation of the residence time (and the reaction rate) is realized by changing the reactor wall temperature. The experiment thereby features the entire advantage of MBMS sampling as the ability of radical detection. The reactor setup additionally supports operation conditions (up to pyrolysis), which are typically not assessable by flame experiments. Numerical CFD simulations are performed in cooperation with the simulation department to assist the design and development process in order to specify dimensions, flow effects or general boundary conditions.