Whilst aerothermal data on double-w

Whilst aerothermal data on double-wall type cooling systems is still relatively sparse, a number of studies have been performed in recent years which advance understanding of the technology (see for example [2]–[10]). Aspects from several of these studies are further discussed in the literature review section.The complex flow interactions that occur within the double-wall cooling system mean that, to accurately capture the cooling performance of a geometry using conjugate CFD, necessitates dense computational meshes and high-fidelity turbulence modelling. Consequently, such simulations are resource intensive. As a result, investigating a large design space and performing geometric optimisations via CFD for such cooling arrangements is currently unfeasible. Similarly, the cost and time associated with experimentally studying double-wall systems requires that a design space is initially explored prior to homing in on geometries which are worth experimentally validating.Such a dilemma demonstrates the need for lower order thermal models that can quickly – but reliably – provide a prediction of the cooling performance achieved for a particular double-wall arrangement. This study discusses the developmentand validation of one such model which nearly instantaneously estimates the achievable cooling effectiveness for a double-wall,effusion system.