NPS NRP Executive SummaryFuels with high efficiency and energy densities are needed to maximize the range and speed of future air-breathing systems such as solid fuel ramjets (SFRJ). The performance of the fuel mixtures that include large amount of metal additives suffer due to the poor combustion efficiency of the metal powders as they often do not burn completely during the short residence time in the combustor. Recent research has improved the reactivity of these fuels, but introducing them into a binder at high loading densities is a challenge due to the poor rheology. In order to develop and maximize the energy density and performance of SFJR fuel grains, advancements in additive manufacturing (AM) systems will be leveraged. This study will utilize vibration-assisted printing (VAP) and liquid metal printing (LMP) with the Xerox ElemX system to print fuel grains with metal powders and aluminum alloys, and use spray dried nanocomposite mesoparticles as additives. The research will test the physical limits of these approaches and determine optimal printing parameters for producing high quality printed fuels. The fuels will be evaluated mechanically and optimized using fly out calculations and they will be characterized with small scale combustion studies.Naval Air Warfare Center Weapons Division (NAWCWD)ASN(RDA) - Research, Development, and AcquisitionThis research is supported by funding from the Naval Postgraduate School, Naval Research Program (PE 0605853N/2098). https://nps.edu/nrpChief of Naval Operations (CNO)Approved for public release. Distribution is unlimited.
