NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsA Simple Transient Thermal Test Assembly for Insulation MaterialsA simple transient thermal test was developed for evaluating the thermal performance of high-temperature flexible insulation materials in atmospheric pressure air. The test setup was inspired by the test assembly used for evaluating the performance of fire shelters and fire protective clothing. The heating source used was a burner supplied with propane gas that can generate relatively uniform heating over a wide area. The ratio of the in-plane width to thickness of the insulation test sample in the test assembly was selected to be greater than ten so that the heat transfer in the center of the test assembly was nearly one-dimensional. A rigid, thin Inconel plate was used as the septum plate directly exposed to the flame to provide a relatively uniform, known-temperature boundary condition for the test assembly, and to prevent convective heat transfer through the test insulation from the burner. The test sample, flexible alumina paper insulation, was placed between the Inconel plate and a thin titanium witness plate. The overall assembly was further insulated using a combination of rigid and flexible ceramic insulations to minimize heat losses from the periphery of the test assembly. Thermocouples installed on the septum and witness plates and inside the insulation test sample provided temperature measurements at various locations. For the evaluation tests, the Inconel septum plate reached temperatures between 780°C and 850°C for tests with flame exposure durations of 120 sec to 300 sec. The measured temperatures for various tests with similar flame exposure times were repeatable. A one-dimensional numerical heat transfer model of the test assembly was developed. The close agreement between measured and predicted temperatures on the titanium witness plate and inside the insulation test sample indicated that this test may provide a one-dimensional thermal testing capability for evaluation of thermal performance of similar insulations.Document ID20190001424Acquisition SourceLangley Research CenterDocument TypeTechnical Memorandum (TM)AuthorsDaryabeigi, Kamran*(NASA Langley Research Center Hampton, VA, United States)*Blosser, Max L.*(Max Blosser Consulting Williamsburg, VA)*George, Wayne D.*(NASA Langley Research Center Hampton, VA, United States)*Cheatwood, Jonathan S.*(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)*Date AcquiredMarch 12, 2019Publication DateFebruary 1, 2019Subject CategoryChemistry And Materials (General)Report/Patent NumberL-20995NASA/TM?2019-220249NF1676L-32276Funding Number(s)WBS: WBS 321991.02.23.01Distribution LimitsPublicCopyrightPublic Use Permitted.Available DownloadsNameType20190001424.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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