Themal analysis and Design Optimization of Multilayer Insulation for Reentry Aerodynamic Heating

摘要

A design-of-experiment technique was used to investigate optimum design of multilayer insulations for reentry aerodynamic heating. Combined radiation/conduction heat transfer in high-temperature multilayer insulations was modeled using a finite volume numerical model, which was validated by comparison with steady-state effective thermal conductivity measurements, and transient thermal tests simulating reentry aerodynamic heating condi- tions. It was found the use of 2-mm foil spacing and locating the foils near the ht boundary, with the top foil 2 mm away from the hot boundary, resulted in the most effective insulation design.