Mutlu Çelik, M.Sc.
Department of Scientific Computing
December 2022
Supervisor: Ömür Uğur (Institute of Applied Mathematics, Middle East Technical University, Ankara)
Co-Supervisor: Sinan Eyi (Aerospace Engıneering, Middle East Technical University, Ankara)
Abstract
In this thesis, open source softwares SU2 Multiphysics and The Porous material Analysis Toolbox (PATO) based on OpenFOAM are used to conduct loosely coupled analysis of hypersonic non-equilibrium flow and thermochemical ablation. Both solvers have become prominent open source softwares with numerous validation and verification cases. NEMO, the non-equilibrium modeling solver of SU2 is used to model chemically reactive and non-equilibrium flows by integrating thermochemistry library of Mutation++. SU2-NEMO solves Navier Stokes equations with thermochemical non-equilibrium effects by using finite volume method. As a material response code, ablation solver PATO is used to calculate the surface temperature of solid materials and surface recession due to ablation. PATO, as a fully portable OpenFOAM library, discretizes conversation equations of total energy, gas momentum, gas mass, solid mass and gas species equations by finite volume method. The output of surface recession is used as input of SU2-NEMO for CFD analysis. SU2-NEMO then calculates the surface heat flux and pressure which are used as inputs of PATO. At the end, the effect of surface recession to surface heat flux distribution of blunt nose geometry is investigated.
Keywords: Ablation, Non-equilibrium flow, Hypersonic Aerothermodynamics