EFFECTIVE EMISSIVITY OF NONISOTHERMAL ISOGRID FOR SPACECRAFT RADIATOR APPLICATIONS

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dc.contributor.advisorChen, Ruey-Hung
dc.contributor.authorAbramczyk, Seth
dc.contributor.departmentMechanical Engineering
dc.contributor.programEngineering, Mechanical
dc.date.accessioned2022-09-29T15:38:25Z
dc.date.available2022-09-29T15:38:25Z
dc.date.issued2021-01-01
dc.description.abstractAccurate knowledge of the optical properties of spacecraft components, especially external components, is critical for proper spacecraft thermal design. The effective emissivity of isogrid (an array of equilateral triangular cavities) is not well understood, which poses a challenge for spacecraft thermal management. In this theses the effective emissivity of isogrid with a prescribed base temperature and nonisothermal walls is examined. The temperature profile of the cavity's walls and the overall effective emissivity of the cavity are found using Thermal Desktop with Monte Carlo ray tracing. The effective emissivity's dependence on the wall height, wall thickness, wall resistance, and surface emissivity are examined. The existence of a critical wall height, and the contributing factors to this critical height, are discussed. Comparisons between isogrid and cavities with different base geometries are made. A variable emissivity isogrid spacecraft radiator concept employing the cavity effect is proposed, and mechanisms for achieving this are discussed.
dc.formatapplication:pdf
dc.genretheses
dc.identifierdoi:10.13016/m2ojxg-0ivt
dc.identifier.other12472
dc.identifier.urihttp://hdl.handle.net/11603/26043
dc.languageen
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Mechanical Engineering Department Collection
dc.relation.ispartofUMBC Theses and Dissertations Collection
dc.relation.ispartofUMBC Graduate School Collection
dc.relation.ispartofUMBC Student Collection
dc.rightsThis item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please see http://aok.lib.umbc.edu/specoll/repro.php or contact Special Collections at speccoll(at)umbc.edu
dc.sourceOriginal File Name: Abramczyk_umbc_0434M_12472.pdf
dc.subjectCavity Effect
dc.subjectEffective Emissivity
dc.subjectSpacecraft Radiator
dc.subjectSpacecraft Thermal Control
dc.subjectVariable Emissivity Radiator
dc.titleEFFECTIVE EMISSIVITY OF NONISOTHERMAL ISOGRID FOR SPACECRAFT RADIATOR APPLICATIONS
dc.typeText
dcterms.accessRightsDistribution Rights granted to UMBC by the author.
dcterms.accessRightsAccess limited to the UMBC community. Item may possibly be obtained via Interlibrary Loan thorugh a local library, pending author/copyright holder's permission.

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