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Multi-dimensional, inviscid flux reconstruction for simulation of hypersonic heating on tetrahedral grids
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gnoffo, Peter A. |
| Copyright Year | 2009 |
| Description | The quality of simulated hypersonic stagnation region heating on tetrahedral meshes is investigated by using a three-dimensional, upwind reconstruction algorithm for the inviscid flux vector. Two test problems are investigated: hypersonic flow over a three-dimensional cylinder with special attention to the uniformity of the solution in the spanwise direction and hypersonic flow over a three-dimensional sphere. The tetrahedral cells used in the simulation are derived from a structured grid where cell faces are bisected across the diagonal resulting in a consistent pattern of diagonals running in a biased direction across the otherwise symmetric domain. This grid is known to accentuate problems in both shock capturing and stagnation region heating encountered with conventional, quasi-one-dimensional inviscid flux reconstruction algorithms. Therefore the test problem provides a sensitive test for algorithmic effects on heating. This investigation is believed to be unique in its focus on three-dimensional, rotated upwind schemes for the simulation of hypersonic heating on tetrahedral grids. This study attempts to fill the void left by the inability of conventional (quasi-one-dimensional) approaches to accurately simulate heating in a tetrahedral grid system. Results show significant improvement in spanwise uniformity of heating with some penalty of ringing at the captured shock. Issues with accuracy near the peak shear location are identified and require further study. |
| File Size | 5444240 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090007599 |
| Archival Resource Key | ark:/13960/t1fj7fj57 |
| Language | English |
| Publisher Date | 2009-01-05 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Algorithms Simulation Heating Unstructured Grids Mathematics Tetrahedrons Stagnation Point Hypersonic Flow Boundary Conditions Surface Diffusion Heat Flux Defects Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
