Development of experimental techniques and experimental equipment for combustion studies, part II

This report describes the development of an experimental facility for combustion studies. The aim is to develop experimental methods for comparison with computer based simulations. The experimental methods that are intended to be used are LIF - Laser Induced Fluorescence, shadow and schlieren techniques and interferometrical methods (primarily holography), the latter in co-operation with LTU-Luleå Technical University. During this year the facility has been installed in the laser laboratory and has been integrated with the instrumentation. The facility has been adapted to be used in a safe manner when studying combustion of hydrogen gas. Equipment has been constructed to control and trig different events in the experiments. The first experimental tests with shadow and schlieren technique have been performed. In these tests a jet originating from combustion of an air/hydrogen gas mixture in a cavity with a small exhaust nozzle has been studied. A first numerical simulation has also been performed for this case. Matlab-based code has also been developed for comparing simulation and experiments with raytracing and for evaluation of schlieren tests. An application to The Swedish Research Council has been granted for a joint project with Experimental Mechanics at LTU for interferometrical combustion studies. An experimental and numerical investigation of a propane jet flame has been performed during the year in co-operation with LTU. A simulation of this case, which was done by the computational physics group at FOI, has been compared with the experiments. The result of this work is intended to be published in a scientific journal.