Technology

Modeling and Simulation of Hypersonic Entry Systems

NTH can model entry flow environment across all the Mach numbers ranging from M=5 to M=40.
The modeling capabilities include:

  • the description of the flow physics with chemical reactions and thermal non-equilibrium effects;
  • The ability to model the radiation signature from the hot gases and the response of the thermal protection system. Both radiation and material response simulations can be computed in a tightly coupled or decoupled manner.
  • Modeling of turbulence leveraging both RANS or LES models.

Modeling and Simulation of high-temperature across all scales.

NTH can construct thermo-mechanical models for high-temperature materials. This includes both ablators and non-ablators, of different porosity.

The modeling capabilities include:

  • Modeling the material response of the thermal protection system across all the scales: From atomistic to vehicle scale.
  • Atomistic based models (e.g., Molecular Dynamics).
  • Meso-scale modeling of thermophysical and mechanical effects.
  • Construction of macroscopic model to be used in the material response codes.

Modeling and Simulation of Thermal Protection Systems

NTH can model thermo-mechanical response of the Thermal Protection System.

The modeling capabilities include:

  • Conjugate heat transfer
  • Material response modeling of porous media including conduction, convection, diffusion of the pyrolysis gases.
  • Porous and Non-porous materials (e.g., ceramics).
  • The model can be coupled and integrated to the multi-physics solver.

Radiation modeling including spectral modeling and radiation heat-transfer.

NTH can model the flow and the radiation signature and transfer radiation modeling.
The modeling capabilities include:

  • Direct solution of the Radiation Transfer Equation. Use of Sn method for the angular integration.
  • Ab-initio based modeling of spectral properties for molecular and atomic systems of interest to hypersonics.
  • Ability to construct models for the spectral properties of the plasma.
  • Ability to use simplified models like PN to enhance the computational efficiency.

Modeling and Simulation of Plasma-Discharges

NTH can model the flow and the radiation signature in plasma driven wind tunnels.
The modeling capabilities include:

  • Modeling of the electromagnetic discharge, including fields and plasma coupling for arc-jets and inductively plasma discharges;
  • arc-attachment modeling and plasma material interaction.
  • Radiation and material response
  • Non-equilibrium kinetics and radiation