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Reentry Simulation on CMC Materials.

Kindler, K. (1994) Reentry Simulation on CMC Materials. High Temp. Chem. Processes, 3, pp. 297-308. Edition de Physic, 7 av. du Hoggar, BP 112 de Courtaboeuf, F-91944 Les Ulis Cedex A.

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Abstract

One of the main topics of investigating reentry bodies is the evaluation of heat protection systems, especially the choice and development of proper materials. The reentry process takes place in hypervelocity flow fields of thermodynamic nonequilibrium which are connected with complex interaction between chemical processes in the high temperature air and others at the surface of the heat protection material. The arc-heated wind tunnel LBK of DLR is one of the few existing high energy facilities for testing thermal protection materials with realistic gas surface interactions over times sufficient for stationary test conditions. Tests with samples arranged in the stagnation area of models give the possibility to consider the reaction of the thermal protection material dependent on the enthalpy, the surface pressure and the nonequilibrium conditions of the flow field. The reaction is identified by measuring the surface temperature, the mass loss rate and the change of the material thickness. Additional to these integral measurements investigations are made with a scanning electron microscope over the cross section of the sample to indicate the species distribution, especially the depth of penetration of the O-species into the probe. The flat plate tests give information about the dependence of the temperature field at the surface from the different sample materials. The temperature distribution at the surface indicates the distinguishable catalytic efficiency of the material.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1994, pages=12,
Title:Reentry Simulation on CMC Materials.
Authors:
AuthorsInstitution or Email of Authors
Kindler, K.UNSPECIFIED
Date:1994
Journal or Publication Title:High Temp. Chem. Processes
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:3
Page Range:pp. 297-308
Publisher:Edition de Physic, 7 av. du Hoggar, BP 112 de Courtaboeuf, F-91944 Les Ulis Cedex A
Status:Published
Keywords:Heat Protection Material, High Enthalpy Flow, Surface Temperature, Erosion Rates, EDX Microanalysis
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 05:28

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