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Influence of Catalysis and Oxidation on Slug Calorimeter Measurements in Arc JetsArc jet tests play a critical role in the characterization and certification of thermal protection materials and systems (TPS). The results from these arc jet tests feed directly into computational models of material response and aerothermodynamics to predict the performance of the TPS in flight. Thus the precise knowledge of the plasma environment to which the test material is subjected, is invaluable. As one of the environmental parameters, the heat flux is commonly measured. The measured heat flux is used to determine the plasma enthalpy through analytical or computational models. At NASA Ames Research Center (ARC), slug calorimeters of a geometrically similar body to the test article are routinely used to determine the heat flux. A slug calorimeter is a thermal capacitance-type calorimeter that uses the temperature rise in a thermally insulated slug to determine the heat transfer rate, see Figure 1(left). Current best practices for measuring the heat flux with a slug calorimeter are described in ASTM E457 - 96. Both the calorimeter body and slug are made of Oxygen Free High Conductivity Copper, and are cleaned before each run.
Document ID
20120016789
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Nawaz, Anuscheh
(Sierra Lobo, Inc. Moffett Field, CA, United States)
Driver, Dave
(NASA Ames Research Center Moffett Field, CA, United States)
TerrazasSalinas, Imelda
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 26, 2013
Publication Date
October 22, 2012
Subject Category
Instrumentation And Photography
Report/Patent Number
ARC-E-DAA-TN5068
Meeting Information
Meeting: Specialists'' Meeting AVT-199 /RSM-029: Catalytic Gas Surface Interactions
Location: Rhode, Saint Genese
Country: Belgium
Start Date: October 22, 2012
End Date: October 24, 2012
Sponsors: NATO Research and Technology Organization
Funding Number(s)
CONTRACT_GRANT: NNA09DB39C
Distribution Limits
Public
Copyright
Public Use Permitted.
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