A Couple Approach for a Conjugate Heat Transfer Investigation of the Shape-Change Effects in a Composite Nozzle

Abstract

To address the conjugate heat transfer problem in complex geometries, a coupling approach based on the local coordinate transformation is developed to evaluate the common wall temperature on non-orthogonal solid–fluid interfaces. The proposed coupling approach is validated and then used to investigate the erosion-induced shape change effects in a composite nozzle. The changes of flow field are evident in terms of the Mach number, temperature, and pressure, especially in the vicinity of erosion steps. The comparison of the wall pressure distribution indicates that the nozzle thrust performance degrades after erosion.