%0 Journal Article
%A Stoffels, G. G. M.
%A Roekaerts, Dirk J.E.M.
%A Louwers, Jeroen
%A Gadiot, G. M. H. J. L.
%D 2002
%I Begell House
%K laser diagnostics, diffusion flame, HNF, propellants, CN, OH
%N 1-6
%P 523-532
%R 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.560
%T DIFFUSION FLAME STRUCTURE OF HNF SANDWICHES
%U http://dl.begellhouse.com/journals/17bbb47e377ce023,76f8e14974df93a8,4802628378fae267.html
%V 5
%X The planar laser induced fluorescence technique (PLIF) has been used to study the diffusion flame structure of propellants consisting of hydrazinium nitroformate (HNF) and glycidyl azide polymer (GAP). Goal of the experiment is to obtain more insight in the effect of the particle size distribution on the combustion properties of HNF/GAP propellants. OH and CN-distributions were measured at different pressures. In addition to neat HNF and HNF-propellants, HNF/GAP/HNF-sandwiches, which have a simple two-dimensional structure, were used for a more accurate determination of the interaction between the HNF flame and the GAP flame. The results are compared to CFD calculations. It was found that a diffusion flame was present but it is located higher above the surface than the monopropellant flame. At higher pressure the diffusion flame is smaller, but its height is almost independent of the pressure. The results imply that the burn rate of HNF/GAP-propellants will not depend on the particle size as is seen in AP-based propellants, where diffusion flames appear to be strong and close to the surface.
%8 2002-01-01