MEASUREMENT SYSTEM FOR SIMULTANEOUS SPECIES DENSITIES, TEMPERATURE, AND VELOCITY DOUBLE-PULSE MEASUREMENTS IN TURBULENT HYDROGEN FLAMES

A laser-based measurement system has been developed that is capable of measuring the densities of all majority species, temperature and velo cities simultaneously in turbulent hydrogen flames. The experiment aim s on complete characterization of the instantaneous combustion situati on in the probe volume. The measurement of these quantities is perform ed twice with a short time delay (mu s-ms) using two laser pulses. Thi s double-pulse technique is performed in order to monitor the temporal development of turbulent mixing and combustion. It is expected that t he chain of cause and effect of mixing and combustion processes can be studied in detail by monitoring the situation over a sufficiently sho rt time step. The novel measurement technique is discussed in detail a nd first experimental results are presented.