On Applications of High Resolution Shock Capturing Methods to Unsteady Flows

Abstract

Two applications of modern high resolution shock capturing methods to high speed compressible aeronautical flows are presented. The first application concerns the phenomenon of surge interaction in a twin side-by-side intake configuration. Unsteadiness was introduced by prescribing a pressure disturbance at the exit plane of one of the intakes. The case reported corresponds to static ground-running of the engines. The calculations were carried out on a body fitted structured grid using a finite volume method of the Godunov-type with MUSCL reconstruction and showed good agreement with available data. The second application demonstrates the utility of using a Cartesian cut cell method as an alternative to structured or unstructured methods for flows around complex geometries either stationary or in relative motion. The flow solver used in the first application was modified to facilitate both body motion and cell merging in order to maintain strict conservation and numerical stability.