Sasi Kiran PALATEERDHAM, Abdul RAHMAN, Sri Nithya MAHOTTAMANANDA, Yash PAL, Antonella INGENITO
DOI Number: 10.82241/ceas-hisst-2024-293
Conference number: HiSST-2024-293
In solid fuel Ramjet engine, the performance is impacted by fuel energy density and combustion behaviour which is a key for the total impulse. However, in terms of intensive properties, impulse density is more important than particular impulse, although the two variables do not need to be mutually unrelated. Since impulse density is the combination of material density, an increasing specific impulse increases impulse density. The impulse density, on the other hand, grows linearly with the material density, but the particular specific impulse grows proportionately to the square root of the flame temperature or heat release. As a result, increasing the fuel density has the greatest direct influence on impulse density and, eventually, the overall impulse of the vehicle. Increasing fuel density can be achieved by adding additives and energetic particles to the fuel matrix. Thus, the goal of the work is to improve the impulse density of the Ramjet solid fuels by adding high energetic materials such as Boron (B), magnesium diboride (MgB2), Carbon Black (CB) and magnesium (Mg), Titanium, Cerium oxide (CeO2) into Paraffin and HTPB based fuel matric. The performance characteristics of these solid fuels is by conducting thermogravimetric, Differential scanning calorimeter analyses, bomb calorimetry, mass spectroscopy, and ballistic fire testing. According to the test results, the material decomposes at a relatively low temperature and mostly into gaseous species with autoignition temperatures lower than the peak decomposition temperature. The fuel grain testing results show consistent combustion and acceptable regression rates. Based on the data gathered, the current study shows an ideal solid fuel for SFRJ applications. A detailed comparison of these solid fuels and their characteristics is given in this paper.