Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
PREDICTION OF HYPERSONIC REACTIVE FLOWS DURING ATMOSPHERIC ENTRY PROCEDURE OF THE FIRE II SPACE CAPSULE
Submission Author:
Farney Moreira , SP
Co-Authors:
Farney Moreira, William Wolf, João Luiz F. Azevedo
Presenter: Farney Moreira
doi://10.26678/ABCM.COBEM2021.COB2021-0723
Abstract
Numerical simulations of a mixture of oxigen and nitrogen are presented for the Fire II capsule under hypersonic flow conditions including thermodynamic nonequilibrium. Two models for chemical nonequilibrium and transport properties are tested and their results are compared to experimental data available in terms of convective heat flux. The finite volume method is used to solve the Navier-Stokes equations including Park's two-temperature model. Results are presented in terms of heat flux distribution over the capsule surface and good agreement is observed between simulations and experimental data. The shock wave topology and species dissociation profiles lead to changes with respect to thermal non-equilibrium, presented in terms of the translational-rotational and vibrational-electronic temperature modes. At the initial moment of the reentry path, where flow speed and altitude are high, there is complete dissociation of nitrogen, N2, and oxygen, O2, molecules. Under such conditions, it is also possible to observe the occurrence of thermodynamic non-equilibrium through the magnitude difference of the translational-rotational and vibrational-electronic temperature modes inside the shock layer forming upstream of the capsule.
Keywords
Hypersonic Flow, Thermodynamic non-equilibrium, Heat transfer, Chemical dissociation
