Investigation of the Role of Transient Growth in Roughness-Induced Transition; Final rept. 1 Mar-30 Nov 2007

摘要

A number of topics relating to transient growth are addressed. These encompass its roots in stability theory, computation of optimal transient growth characteristics for both parallel and non-parallel flow formulations, and the application of this information to multimode decomposition and roughness-induced transition. All of these are based on the spatial transient growth theory. For the important case of nosetip transition, the resulting transition relations reproduce the trends of the Reda and PANT data and carefully account for the separate roles of roughness and surface temperature level on transition behavior.