Numerical Simulation About Transient Performance of Regenerative Cooling System for Combustion Chamber

Regenerative cooling is one of the most promising methods for the active thermal protection of hypersonic vehicles. The transient performance of regenerative cooling system using hydrocarbon fuels for combustion chamber before/after ignition is simulated. The cooling performance of the cooling system under different thermal boundaries is compared and discussed by referring to the distribution of temperature, velocity, and conversion of hydrocarbon fuels. Results show that the temperature of the fuel first decreases with the heat flux and then rises due to the endothermic reaction during the pyrolysis process. The relaxation time of the cooling system is longer than the ignition delay time. The heat transfer characteristics under uniform and distributed thermal boundary are different, which significantly affects the wall temperature distribution.