Investigation on combination of active and passive thermal protection for RBCC engine

The thermal protection is the key problem for RBCC engine engineering development with the intensive research. The thermal protection scheme was studied in this paper based on the thermal environments which are achieved by numerical simulations of different modes. The results show that active cooling and passive cooling method cannot satisfy the RBCC thermal protection requirements either. A new thermal protection with combination of active and passive cooling concept was designed. The C/SiC ceramic matrix composites are used for combustor inner wall. The regenerative cooling modules were installed at the sections heated seriously. The simulation results show that the combination thermal protection resolve the problem of the shortage of coolant and satisfy the thermal protection requirement of RBCC engine operating.