Accession Number:

AD1026291

Title:

VKI Activities in Support of AFOSR Basic Research Interests: Steady State Pyrolysis and Ablation Investigation

Descriptive Note:

Technical Report,01 Jan 2007,31 Dec 2007

Corporate Author:

von Karman Institute for Fluid Dynamics, Aeronautics and Aerospace Dept. Rhode-St-Genese Belgium

Personal Author(s):

• Vancrayenest,B.
• Playez,M.
• Fletcher,D.

Report Date:

2008-03-31

Pagination or Media Count:

45.0

Abstract:

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 .

Descriptors:

• Pyrolysis
• emission spectroscopy
• heat transfer
• graphitic materials
• ablation
• STAGNATION POINT
• composite materials

Subject Categories:

• Physical Chemistry
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE