Schrooyen, Pierre
[UCL]
Chatelain, Philippe
[UCL]
Hillewaert, Koen
[Cenaero]
Magin, Thierry E.
[von Karman Institute for Fluid Dynamics]
The atmospheric entry of spacecraft presents several challenges in simulating the aerothermal flow around the heat shield. Predicting an accurate heat-flux is a complex task, especially regarding the interaction between the flow in the free stream and the erosion of the thermal protection material. To capture this interaction, a continuum approach is developed to go progressively from the region fully occupied by fluid to a receding porous medium. The volume averaged Navier-Stokes equations are used to model both phases in the same computational domain considering a single set of conservation laws. The porosity is itself a variable of the computation, allowing to take volumetric ablation into account through adequate source terms. This approach is implemented within a computational tool based on a high-order discontinuous Galerkin discretization. The multi-dimensional tool has already been validated and has proven its efficient parallel implementation. Within this platform, a fully implicit method was developed to simulate multi-phase reacting flows. Numerical results to verify and validate the methodology are considered within this work. Interactions between the flow and the ablated geometry are also presented.
Bibliographic reference |
Schrooyen, Pierre ; Chatelain, Philippe ; Hillewaert, Koen ; Magin, Thierry E.. Continuum approach for aerothermal flow through ablative porous material using discontinuous Galerkin discretization.67th Annual Meeting of the APS Divicion of Fluid Dynamics (San Francisco, California, du 23/11/2014 au 25/11/2014). In: Bulletin of the American physical society, Vol. 59, no.20, p. 289 (Novembre 2014) |
Permanent URL |
http://hdl.handle.net/2078.1/154334 |