TY - GEN
T1 - Analysis of the reentry-F experiment using detached eddy simulation
AU - Barnhardt, Michael
AU - Candler, Graham V.Candler
PY - 2009
Y1 - 2009
N2 - A computational analysis of the Mach 20 Reentry-F vehicle is performed in order to assess current capabilities for prediction of turbulent base heating. The detached eddy simulation (DES) methodology is employed to model the unsteady wake of the vehicle. Comparisons between traditional Reynolds-averaged Navier- Stokes (RANS) methods and DES reveal no improvement if the computational grid is insufficiently resolved. On the other hand, where RANS gains little from refinement of the grid, DES shows substantial improvement. Prior studies of the Reentry-F vehicle have generally neglected its slight angle of attack, an approach which fails to account for the asymmetry present in the forebody transition profile and base heating distribution. In this paper, we present a three-dimensional analysis of the entire vehicle to address these issues. The computed results reveal a strong dependence on vehicle orientation especially at lower altitudes where the vehicle experienced significant thermal distortion. Despite this difficulty, solution accuracy is demonstrated to lie within the bounds of the experimental uncertainty provided sufficient care is taken to define flight conditions. This suggests DES to be a capable tool for unsteady aerothermal analysis.
AB - A computational analysis of the Mach 20 Reentry-F vehicle is performed in order to assess current capabilities for prediction of turbulent base heating. The detached eddy simulation (DES) methodology is employed to model the unsteady wake of the vehicle. Comparisons between traditional Reynolds-averaged Navier- Stokes (RANS) methods and DES reveal no improvement if the computational grid is insufficiently resolved. On the other hand, where RANS gains little from refinement of the grid, DES shows substantial improvement. Prior studies of the Reentry-F vehicle have generally neglected its slight angle of attack, an approach which fails to account for the asymmetry present in the forebody transition profile and base heating distribution. In this paper, we present a three-dimensional analysis of the entire vehicle to address these issues. The computed results reveal a strong dependence on vehicle orientation especially at lower altitudes where the vehicle experienced significant thermal distortion. Despite this difficulty, solution accuracy is demonstrated to lie within the bounds of the experimental uncertainty provided sufficient care is taken to define flight conditions. This suggests DES to be a capable tool for unsteady aerothermal analysis.
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M3 - Conference contribution
AN - SCOPUS:66949165113
SN - 9789292212230
T3 - European Space Agency, (Special Publication) ESA SP
BT - Proceedings of the 6th European Symposium on Aerothermodynamics for Space Vehicles
T2 - 6th European Symposium Aerothermodynamics for Space Vehicles
Y2 - 3 November 2008 through 6 November 2008
ER -