High speed combustion - Activities during 2004

An account is given for the work that has been done to study high speed combustion during 2004 in the FOI-project, Framdrivning (Propulsion). The high speed combustion work was initiated with the aim to develop FOI:s competence in new experimental techniques for combustion diagnostics. The experimental methods used are LIF - Laser Induced Fluorescence, shadow, schlieren and interferometrical methods (primarily holography), the latter in cooperation with LTU-Luleå Technical University. This report describes the changes and the improvements which have been done to the experimental technique used for PLIF (Planar Laser Induced Fluorescence). It also describes the development of evaluation methods to combine schlieren and interferometry in order to benefit from the advantages of each of them. The experiments were done in the high speed combustion rig which has been built in this project, where the propagation of a high speed turbulent flame jet of an air/hydrogen gas mixture was studied. Descriptions are given of the experimental results and the evaluation of the results.