2. Theoretical Modeling of Aeroheating Under Rarefied Gas Effects

In the first chapter, it has been mentioned that the utmost critical points concerning thermal protection are the stagnation point of the leading edge and the reattachment point behind a separation flow region. The wall surfaces near these points suffer from peak heat fluxes, and thus the surface temperature is relatively higher than elsewhere. These most dangerous regions are likely to be ablated first, and should be specially protected by UHTC materials. Therefore, our target is currently focused on the prediction of aeroheating performance of the typical stagnation point region, although the methodology and some conclusions are universal to an extent. In fact, we have found that the engineering theory established at the stagnation point region is also useful for analogy analysis of other regions.