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Feature-Based and Output-Based Grid Adaptation Study for Hypersonic Propulsive Deceleration Jet Flows

Hicham Alkandry, Michael A. Park, William L. Kleb, and Iain D. Boyd

Research Notes, 19th International Meshing Roundtable, Springer-Verlag, pp.Research Note, October 3-6 2010

IMR
PROCEEDINGS

19th International Meshing Roundtable
Chattanooga, Tennessee, USA.
October 3-6, 2010

University of Michigan.
Email: halkandr@umich.edu
NASA LaRC, Computational AeroSciences Branch.
Email: Mike.Park@NASA.gov
NASA LaRC, Aerothermodynamics Branch.
Email: Bil.Kleb@NASA.gov
University of Michigan.
Email: iainboyd@umich.edu

Summary
The size requirements for conventional aerodynamic decelerators (parachutes) used to slow Mars entry vehicles during atmospheric descent are becoming un- feasible due to the increasing mass and landing site altitude of future missions. One alternative is propulsive decelerator (PD) jets. The use of PD jets, however, involves complex ow interactions that are still not well understood. Computational fluid dynamics (CFD) is currently being investigated as a tool for predicting these ow interactions. However, manually generating appropriate grids for these ows is dicult and time consuming because of the complexity of the flowfield. Therefore, automatic grid adaptation techniques present an attractive option to accurately capture the ow features and interactions. This study compares the grids and solutions for hypersonic PD jet flows using feature-based and output-based grid adaptation techniques.

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