Convective Heat Transfer in Hypersonic Non-Equilibrium Reactive Flows Over the Fire II Reentry Capsule

Author(s)

Moreira, Farney Coutinho ; Wolf, William Roberto ; Azevedo, Joao Luiz F.

• Document type: Journal article
• Source: AIAA SCITECH 2022 FORUM; v. N/A, p. 18-pg., 2022-01-01.

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 distributions 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 here addressed, where flow speed and altitude are high, there is complete dissociation of nitrogen, N-2, and oxygen, O-2, 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. (AU)

• FAPESP's process: 21/02705-8 - Aerothermodynamic analysis of hypersonic flows with applications for atmospheric reentry procedures
• Grantee: Farney Coutinho Moreira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 13/07375-0 - CeMEAI - Center for Mathematical Sciences Applied to Industry
• Grantee: Francisco Louzada Neto
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC