Fabian Teschner M.Sc.

Fabian Teschner M.Sc.

Re-entry optimization to minimize heating or infrared signature regarding aerothermodynamic effects

In the development of thermal protection shields for re-entry configurations the laminar-turbulent transition is a crucial design criterion. Due to instabilities in the flow, triggered by e.g. surface roughness or free stream instabilities, the laminar flow around the re-entry configuration becomes turbulent. A major difference between the laminar and the turbulent flow is the significant increase in the heat flux at the surface in a turbulent flow. This phenomenon results in a thicker thermal protection shield to withstand the enormous thermal loads on the re-entry configuration.

The aim of this research project is to investigate the laminar-turbulent transition for re-entry configurations to optimize the re-entry. Therefore, two codes are developed. The first code solves the Navier-Stokes equations to provide an accurate base flow solution. This base flow solution is the input for the second code which solves the parabolized stability equations to investigate the laminar-turbulent transition.

 

Base flow solution of a blunted cone

Conferences:

- Teschner, F., Mundt, Ch., Numerische Untersuchungen der laminar-turbulenten Transition mit Hilfe der parabolisierten                               Stabilitätsgleichungen in Kombination mit einer Euler/Grenzschichtmethode zweiter Ordnung, 18. STAB-Workshop, November 2017, Göttingen, Deutschland

- Teschner, F., Akman, T., Mundt, Ch., Holzapfel F. Aerothermodynamic and Trajectory Studies on Optimal Earth Re-Entry of a Capsule, International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions and Engineering, FAR 2019, October 2019, Monopoly, Italy