On the linear stability of swept attachment-line boundary layer flow. Part 1. Spectrum and asymptotic behaviour

摘要: The temporal stability of swept attachment-line boundary layer flow based on a Hiemenz model is studied. Starting from the global problem and motivated by analytical free-stream solutions, Hermite expansion employed in chordwise coordinate direction which results coupled local problems. A complete study spectrum presented discrete continuous modes are classified according to their symmetry, polynomial order asymptotic decay. Uniform, Gortler-Hammerlin higher-order described detail. Estimates given for location spectrum, bounds derived validity linear approximation