ASTM E 459 : 2022
Current
The latest, up-to-date edition.
Standard Test Method for Measuring Heat Transfer Rate Using a Thin-Skin Calorimeter
Hardcopy , PDF
English
27-04-2022
Important note : Users cannot be edited or removed once added to your Multi user PDF.| Committee |
E 21
|
| DocumentType |
Test Method
|
| Pages |
11
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Current
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| Supersedes |
1.1This test method covers the design and use of a thin metallic calorimeter for measuring heat transfer rate (also called heat flux). Thermocouples are attached to the unexposed surface of the calorimeter. A one-dimensional heat flow analysis is used for calculating the heat transfer rate from the temperature measurements. Applications include aerodynamic heating, laser and radiation power measurements, and fire safety testing.
1.2Advantages:
1.2.1Simplicity of Construction—The calorimeter may be constructed from a number of materials. The size and shape can often be made to match the actual application. Thermocouples may be attached to the metal by spot, electron beam, or laser welding.
1.2.2Heat transfer rate distributions may be obtained if metals with low thermal conductivity, such as some stainless steels or Inconel 600, are used.
1.2.3The calorimeters can be fabricated with smooth surfaces, without insulators or plugs and the attendant temperature discontinuities, to provide more realistic flow conditions for aerodynamic heating measurements.
1.2.4The calorimeters described in this test method are relatively inexpensive. If necessary, they may be operated to burn-out to obtain heat transfer information.
1.3Limitations:
1.3.1At higher heat flux levels, short test times are necessary to ensure calorimeter survival.
1.3.2For applications in wind tunnels or arc-jet facilities, the calorimeter must be operated at pressures and temperatures such that the thin-skin does not distort under pressure loads. Distortion of the surface will introduce measurement errors.
1.3.3Interpretation of the heat flux estimated may require additional analysis if the thin-skin calorimeter configuration is different from the test specimen.
1.4Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4.1Exception—The values given in parentheses are for information only.
1.5This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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