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Modeling the Relationship Between Porosity and Permeability During Oxidation of Ablative MaterialsThe ablative materials used in thermal protection systems (TPS) undergo oxidation during atmospheric entry which leads to an in-depth change in both permeability and porosity. These properties have a significant affect on heat transfer in a TPS during entry. X-ray micro-tomography has provided 3D images capturing the micro-structure of TPS materials. In this study, we use micro-tomography based simulations to create high-fidelity models relating permeability to porosity during oxidation of FiberForm, the carbon fiber preform of the Phenolic Impregnated Carbon Ablator (PICA) often used as a TPS material. The goal of this study is to inform full-scale models and reduce uncertainty in TPS modeling.
Document ID
20170011533
Acquisition Source
Ames Research Center
Document Type
Presentation
Authors
Thornton, John M. (Universities Space Research Association Moffett Field, CA, United States)
Panerai, Francesco (Analytical Mechanics Associates, Inc. Moffett Field, CA, United States)
Ferguson, Joseph C. (Science and Technology Corp. Moffett Field, CA, United States)
Borner, Arnaud (Science and Technology Corp. Moffett Field, CA, United States)
Mansour, Nagi N. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
December 6, 2017
Publication Date
August 30, 2017
Subject Category
Structural Mechanics
Composite Materials
Report/Patent Number
ARC-E-DAA-TN46701
Meeting Information
Meeting: Ablation Workshop
Location: Bozeman, MT
Country: United States
Start Date: August 30, 2017
End Date: August 31, 2017
Sponsors: Montana State Univ.
Funding Number(s)
CONTRACT_GRANT: NNX13AJ38A
CONTRACT_GRANT: DE-AC02-05CH1123
CONTRACT_GRANT: NNA16BD60C
CONTRACT_GRANT: NNA15BB15C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Ablativ
Porosity
Permeability

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