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Apparatus for determining thermophysical properties of test specimensApparatus is described for directly measuring the quantity square root of pck of a test specimen such as a wind tunnel model where p is density, c is the specific heat and k is the thermal conductivity of the specimen. The test specimen and a reference specimen are simultaneously subjected to the heat from a heat source. A thermocouple is attached to the reference specimen for producing a first electrical analog signal proportional to the heat rate Q that the test specimen is subjected to and an infrared radiometer that is aimed at the test specimen produces a second electrical analog signal proportional to the surface temperature T of the test specimen. An analog-to-digital converter converts the first and second electrical analog signals to digital signals. These digital signals are applied to a computer for determining the quantity.
Document ID
19770020187
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Creel, T. R., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Jones, R. A.
(NASA Langley Research Center Hampton, VA, United States)
Corwin, R. R.
(Beta Industries Dayton, Ohio, United States)
Kramer, J. S.
(Beta Industries Dayton, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
July 7, 1977
Subject Category
Research And Support Facilities (Air)
Accession Number
77N27131
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,027,524|NASA-CASE-LAR-11883-1
Patent Application
US-PATENT-APPL-SN-662175
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