Evaluation of Thermal Insulation Performance of a Two-Layer Structural Model

The study aimed to develop a simulation model capable of evaluating the thermal insulation performance of a two-layer structure composed of a stationary air layer and a forced-cooled air layer, considering the three modes of heat transfer: conduction, convection, and radiation. The simulations were conducted using the unsteady Reynolds-Averaged Navier–Stokes (URANS) method. Case studies were carried out focusing on thermal conduction influenced by material properties, thermal convection affected by the presence or absence of openings in the specimen, and thermal radiation governed by the emissivity of the specimen surfaces. As a result, key findings and challenges were identified.