APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - On the Temporal Evolution in Laminar Separated Boundary Layer Shock- Interaction Flows using DSMC

摘要

Hypersonic laminar boundary layer shock-interactions are characterized by spatialregions with both sub and supersonic flow in various degrees of thermochemical non-equilibrium and multiple length scales. The paper will explore the accurate modeling ofsuch flows in a kinetic framework and address questions related to the role of velocityslip and temperature jump in stability and transition and how these may be influenced byvibrational non-equilibrium. We will discuss recent results that have been obtained withthe first ever use of DSMC with linear stability and residuals algorithm analyses toaddress these questions. Amplitude functions of the least-damped linear global mode fora series of axisymmetric base flows over a double cone will be presented showing thepredominant and repeating lambda shock structure at high Reynolds numbers, prior totransition.