{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/129284"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/129284","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Combustion-ablation time scale phenomenology","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","abstract_has_math":false,"creators":["Brown, Julia K."],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Freund, Jonathan B"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-05-05","date_published":"2025-05-05","updated_at":"2026-07-22T22:25:04Z","subjects":["TPS","MMS","Numerical Methods","Newton Solver","CEESD","Implicit Method, Aerospace","Scramjet"],"languages":["en","eng"],"rights":["Copyright 2025 Julia Brown"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/129284","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Freund, Jonathan B"]},{"key":"dc:creator","label":"Author","values":["Brown, Julia K."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-05-05","2025-05"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["TPS","MMS","Numerical Methods","Newton Solver","CEESD","Implicit Method, Aerospace","Scramjet"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Julia Brown"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/129284"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","The student, Julia Brown, accepted the attached license on 2025-04-29 at 21:52.","The student, Julia Brown, submitted this Thesis for approval on 2025-04-29 at 21:54.","This Thesis was approved for publication on 2025-05-05 at 15:07.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22101 on 2025-10-19 at 18:11:22","The thermal protective systems designed for atmospheric reentry are analyzed through sub-mechanisms to understand the multiphysics of integrated structures and inform design choices for scramjet combustors and material optimization. Through the interaction of different mechanisms acting on different time scales, the phenomenology for material degradation of carbon fiber ablators is studied numerically. A simple one-dimensional model was an appropriate first step for analysis of the thermal conduction and oxidation of the material, with nonlinear implicit methods, that facilitate solutions with widely disparate time scales. The numerical solution was verified through a method of manufactured solutions. The model was then expanded, coupling additional physical mechanisms into the system including mass conservation, oxygen transport, and advective velocity within the porous media, thus creating a thermal boundary layer, limiting material oxidation. The different time regimes allow for the comparison of non-dimensional ratios that produce drastically different behaviors for the system. By developing an understanding of multiphysics interactions with time scales for the combustor, optimized design and material constraints can be quickly and affordably determined for experimentation."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Combustion-ablation time scale phenomenology"]}]}],"canonical_facts":{"dc:contributor":["Freund, Jonathan B"],"dc:creator":["Brown, Julia K."],"dc:date":["2025-05-05","2025-05"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms","The student, Julia Brown, accepted the attached license on 2025-04-29 at 21:52.","The student, Julia Brown, submitted this Thesis for approval on 2025-04-29 at 21:54.","This Thesis was approved for publication on 2025-05-05 at 15:07.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22101 on 2025-10-19 at 18:11:22","The thermal protective systems designed for atmospheric reentry are analyzed through sub-mechanisms to understand the multiphysics of integrated structures and inform design choices for scramjet combustors and material optimization. Through the interaction of different mechanisms acting on different time scales, the phenomenology for material degradation of carbon fiber ablators is studied numerically. A simple one-dimensional model was an appropriate first step for analysis of the thermal conduction and oxidation of the material, with nonlinear implicit methods, that facilitate solutions with widely disparate time scales. The numerical solution was verified through a method of manufactured solutions. The model was then expanded, coupling additional physical mechanisms into the system including mass conservation, oxygen transport, and advective velocity within the porous media, thus creating a thermal boundary layer, limiting material oxidation. The different time regimes allow for the comparison of non-dimensional ratios that produce drastically different behaviors for the system. By developing an understanding of multiphysics interactions with time scales for the combustor, optimized design and material constraints can be quickly and affordably determined for experimentation."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/129284"],"dc:language":["en","eng"],"dc:rights":["Copyright 2025 Julia Brown"],"dc:subject":["TPS","MMS","Numerical Methods","Newton Solver","CEESD","Implicit Method, Aerospace","Scramjet"],"dc:title":["Combustion-ablation time scale phenomenology"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Aerospace Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:04Z"}