Large-eddy simulation developments and validations are presented for an improved simulation of turbulent inter-nal flows.Numerical methods are proposed according to two competing criteria:numerical qualities(precisionand spectral characteristics),and adaptability to complex configurations.First,methods are tested on academictest-cases,in order to abridge with fundamental studies.Consistent results are obtained using adaptable finitevolume method,with higher order advection fluxes,implicit grid filtering and“low-cost”shear-improved Sma-gorinsky model.This analysis particularly focuses on mean flow,fluctuations,two-point correlations and spectra.Moreover,it is shown that exponential averaging is a promising tool for LES implementation in complex geome-try with deterministic unsteadiness.Finally,adaptability of the method is demonstrated by application to a con-figuration representative of blade-tip clearance flow in a turbomachine. Large-eddy simulation developments and validations are presented for an improved simulation of turbulent inter-nal flows.Numerical methods are proposed according to two competing criteria: numerical qualities (precision and spectral characteristics), and adaptability to complex configurations. First, methods are tested on academictest-cases, in order to abridge with fundamental studies. Consistent results are obtained using adaptable finite volume method, with higher order advection fluxes, implicit grid filtering and “low-cost ” shear-improved Sma-gorinsky model.This analysis specifically focuses on mean flow, fluctuations, two-point correlations and spectra. Moreover, it is shown that exponential averaging is a promising tool for LES implementation in complex geome-try with deterministic unsteadiness. Finaally, adaptability of the method is demonstrated by application to a con -figuration representative of blade-tip clearance flow in a turbomachine.