超臨界状態における高分子炭化水素燃料の熱分解吸熱特性評価に関する研究

抄録

Application of a regenerative cooling system using hydrocarbon fuel is being studied for reuse type space transport system devised by Japan Aerospace Exploration Agency (JAXA) as a thermal protection method for engine and fuselage surface. To realize the system, numerical analysis technology to estimate thermal cracking characteristics of hydrocarbon fuel is required. In this study, the thermal cracking experiment result of n-octane and the two-dimensional axi-symmetric simulation with thermal cracking result were compared and the validity was evaluated. CRUCH CFD was used for the fluid solver and KUCRS was used for creating the reaction model. This study demonstrated that the simulation roughly reproduced experimental results. However, compared with the experimental results, the simulation results show that the chemical heat sink to conversion rate is small. It is thought that this is mainly due to the fact that reaction products are different due to pyrolytic deposits by coking in experiments.