Optimization and Re-Design of Integrated Thermal Protection Systems Considering Thermo-Mechanical Performance

Integrated thermal protection system (ITPS) is regarded as one of the most promising thermal protection concepts with both thermal insulation and load-bearing capacities. However, the traditional layout of webs could inevitably lead to thermal short effects and high risk of buckling failure of the ITPS. A topological optimization method for the unit cell of the ITPS was established to minimize the equivalent thermal conductivity and elastic strain energy with the constraint of maintaining structural efficiency. The ITPS was re-designed consulting the optimized cell configuration. In order to control the buckling-mode shape and the associated buckling load of the ITPS, the new design was further optimized, subjected to the total weight of the initial design. Detailed finite element models were established to validate the structural responses. By contrast, the optimized design presents lower bottom surface temperature and better thermal buckling characteristics, performing a better balance between thermal insulation and load-bearing constraints.

Advanced methods for organizing thermal protection of hypersonic aircrafts

On the basis of analytical and experimental data, this paper presents possible levels of thermal loading of reusable hypersonic aircrafts. Methods for ensuring the thermal regime of such aircrafts using various passive and active thermal protection technologies are considered. The conducted analysis of the scientific and technical background in terms of the practical implementation of these technologies allowed the authors to draw the conclusion about the relevance and expediency of creating an integrated thermal protection system for reusable high-speed aircrafts.