CMC Materials for Combustion Chamber Applications

CMC materials seem to be a promising candidate for cooled, heavily stressed parts of combustion chambers. For the cooled case, transpiration cooling with porous CMCs seems to be a technique with good prospects. To estimate the effect of hot gas flow onto cooled and uncooled CMCs, test campaigns at different combustion environments were performed. Within the framework of the multi-national and EU-funded project “Aerodynamic and Thermal Load Interactions with Lightweight Advanced Materials for High Speed Flight”, short ATLLAS, some tests with transpiration cooled CMCs were conducted in a kerosene/GOX combustion chamber. Furthermore, tests with uncooled CMCs under GH2/GOX combustion environment were performed at DLR. This paper illustrates the design and hardware characteristics of the CMC samples investigated as well as first experimental results