Modeling the Uptake of Hydrogen Chloride onto Interior Spacecraft Materials

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dc.creatorNiehaus, Justin
dc.creatorMazumder, Sandip
dc.creatorGokoglu, Suleyman
dc.creatorBerger, Gordon
dc.creatorEaston, John
dc.date.accessioned2021-06-24T19:19:19Z
dc.date.available2021-06-24T19:19:19Z
dc.date.issued7/12/2021
dc.descriptionJustin Niehaus, NASA
dc.descriptionSandip Mazumder, The Ohio State University
dc.descriptionSuleyman Gokoglu, NASA
dc.descriptionGordon Berger, USRA
dc.descriptionJohn Easton, Case Western Reserve University
dc.descriptionICES509: Fire Safety in Spacecraft and Enclosed Habitatsen
dc.descriptionThe 50th International Conference on Environmental Systems was held virtually on 12 July 2021 through 14 July 2021.en_US
dc.description.abstractHydrogen chloride (HCl) is a major combustion product from the pyrolysis of polyvinyl chloride (PVC) insulated electrical wires, a common spacecraft fire safety concern. Models at two different scales were developed to predict HCl uptake on anodized, chromate conversion coated (Iridite), and bare aluminum surfaces, as well as on Nomex fabric: a macroscopic one-step global surface reaction model where all the active sites are on the exterior surface, and a pore model where the interior active sites deeper into the oxide layer can also be accessed by HCl. Experiments were performed to calibrate kinetic and diffusion constants in the models. A cast acrylic test cell was used to measure the differences between the inlet and outlet concentration of HCl after inserting a sample rod of the test material. For the materials with a thin (< 200 �m) or no oxide layer, the macroscopic surface reaction model adequately predicts the experimental measurements. For the anodized aluminum with a thicker oxide layer, the pore model provided a better match to experimental results. The results will be discussed with respect to the spacecraft fire safety project (Saffire).en_US
dc.format.mimetypeapplication/pdf
dc.identifier.otherICES-2021-271
dc.identifier.urihttps://hdl.handle.net/2346/87227
dc.language.isoengen_US
dc.publisher50th International Conference on Environmental Systemsen_US
dc.subjectFire Safety
dc.subjectKinetics
dc.subjectModeling
dc.titleModeling the Uptake of Hydrogen Chloride onto Interior Spacecraft Materialsen_US
dc.typePresentationen_US

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