For the thermal cracking and steam reforming reactions of hydrocarbon fuel in regenerative cooling channel

a numerical model coupling with flow

heat transfer and chemical reaction was established to investigate the heat absorbing and reaction properties of hydrocarbon fuel

taking thermo-physical properties under supercritical pressure into consideration. Results showed that

the calculated results were in good agreement with experimental data. The numerical model can predict the wall and fuel temperature distribution

fuel conversion and heat transfer deterioration phenomenon. Fuel with catalytic steam reforming had the advantages of heat sink promotion and lower outlet temperature. Thermal cracking reaction can be inhibited by the existence of steam reforming reactions. The analysis of fuel mass flow rate showed that residence time of the fuel decreased with the increasing mass flow rate

resulting in a lower conversion and chemical heat sink of the hydrocarbon fuel.