**6. Conclusion**

This study numerically investigates three thermal protection systems that have good potential to reduce the critical heat flux imparted to the blunt-bodies vehicle during its atmospheric reentry, the efficiency of opposing jet, and spike configuration have been discussed and the major conclusions established in this study are summarized as follows:

• The opposing jet configuration isolates the body from the wall from the large hypersonic heat flux, which minimizes the temperature of the stagnation zone in the blunt body of the nose by minimizing the thermal transfer between the flux and the wall by approximately 28.75%, creating an area of recirculation that moves the shock wave slightly away from the tip of the nose; as a result, reducing the heat fluxes transferred to the reentry vehicle walls using opposing jet has a significant interest in the aerospace industry that raises important questions, particularly about the feasibility caused by problems of mass and arrangement layout problem.

*Aero Heating Optimization of a Hypersonic Thermochemical Non-Equilibrium Flow… DOI: http://dx.doi.org/10.5772/intechopen.101659*

