VKI Activities in Support of AFOSR Basic Research Interests: Steady State Pyrolysis and Ablation Investigation
Technical Report,01 Jan 2007,31 Dec 2007
von Karman Institute for Fluid Dynamics, Aeronautics and Aerospace Dept. Rhode-St-Genese Belgium
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Compared to non- ablative materials, the stagnation point heat transfer process for ablators is extremely challenging to model , owing to the simultaneous presence of multiple material phases, and to strong diffusion and convection processes that occur from the material to the boundary layer . The objective of this work package is to develop the tools needed to perform careful , quantitative investigations of the interaction of pyrolysis gases with high temperature free stream gases representative of post-shock flow during atmospheric entry . The first part i s on the development of quasi-steady stat e pyrolysisablation devices that provide steady pyrolysis or ablation condition s during which accurate species concentration measurements can be obtained using spectroscopic methods. The second part involves developing the spectroscopic measurement capability using a non-pyrolyzing ablative material, such as graphite. The third part is on application of spectroscopic analysis .
- Physical Chemistry