Mathematical Problems in Engineering
Volume 2009 (2009), Article ID 859678, 14 pages
Research Article

Atmospheric Reentry Dynamics of Conic Objects

1Departmento de Aeronáutica, Universidad Nacional de Córdoba, Vélez Sarsfield 1611, Córdoba 5000, Argentina
2CONICET, Rivadavia 1917, Argentina

Received 25 June 2009; Revised 27 September 2009; Accepted 4 November 2009

Academic Editor: Silvia Maria Giuliatti Winter

Copyright © 2009 J. P. Saldia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


One of the key issues in a reentry risk analysis is the calculation of the aerodynamic coefficients. This paper presents a methodology to obtain these coefficients and couple it to a code that computes re-entry trajectories considering six degrees of freedom. To evaluate the different flight conditions encountered during the natural re-entry of conical objects, the Euler Equations for gasdynamics flows are used. A new scheme TVD (Total Variation Diminishing) is incorporated to a finite volume unstructured cell-centred formulation, for application to three-dimensional Euler flows. Finally, numerical results are obtained for a conical body at different attack angles and Mach. With these results, the calculation of the trajectories during atmospheric re-entry is completed.