Conservation Coupling Technique for Dynamic Inlet-Engine Analyses

Abstract

Ahybridmethodispresentedforunsteadyanalysisofturbineenginepropulsionsystems.Themethodisacoupled analysis of the inlet ‐engine combination, incorporating multidimensional inviscid computational e uid dynamics in the inlet with a one-dimensional dynamic turbomachinery model. The domain coupling technique consists of conservation averaging, which reconciles the dimensional inconsistency and characteristic wave propagation to provide time accuracy. The method is applied to an axisymmetric mixed compression inlet integrated with an eight-stageaxial compressoratMach 2.5 operating conditions. Analysis includes methodology verie cation, steadystate performance, and dynamic results for two different events. The results indicate that the method is capable of simulating large-amplitude dynamic behavior of coupled supersonic inlet ‐engine systems.