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Effect of Insertion of a Heat Flux Gage into a High Temperature Cylindrical Blackbody Cavity on the GageDetailed transient thermal models have been developed to simulate a heat flux gage calibration process capable of generating high heat flux levels. These heat flux levels are of interest to the reciprocating and gas turbine engine industries as well as the aerospace industry. The transient models are based on existing, experimentally validated steady state models of a cylindrical blackbody calibration system. The steady state models were modified to include insertion of a heat flux gage into the hot zone of the calibration system, time-varying electrical current that passes through the resistance heated blackbody, and the resulting heating of the heat flux gage. Heat fluxes computed using detailed transient models were compared to experimental measurements. The calculated and measured transient heat fluxes agreed to within 2 percent, indicating that the models had captured the physical phenomena in the transient calibration. The predicted and measured transient heat fluxes were also compared for two different blackbody configurations. The effect of convection on the blackbody extension was evaluated and found to be a minor factor.
Document ID
20070035855
Acquisition Source
Armstrong Flight Research Center
Document Type
Conference Paper
Authors
Abdelmessih, Amanie N.
(Saint Martin's Coll. Lacey, WA, United States)
Horn, Thomas J.
(NASA Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
August 24, 2013
Publication Date
November 11, 2007
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
IMECE2007-42255
Meeting Information
Meeting: 2007 ASME International Mechanical Engineering Congress and Exposition
Location: Seattle, WA
Country: United States
Start Date: November 11, 2007
End Date: November 15, 2007
Sponsors: American Society of Mechanical Engineers
Distribution Limits
Public
Copyright
Other

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