Actions for Angular Sensitivity of Heat Flux Gages

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Angular Sensitivity of Heat Flux Gages / RL. Alpert, L. Orloff, JL. de Ris

Conference Author
Thermal Measurements: The Foundation of Fire Standards (2001 : Dallas, Texas)
Physical Description
1 online resource (14 pages) : illustrations, figures, tables
Additional Creators
Orloff, L., Alpert, RL., de Ris, JL., American Society for Testing and Materials, and ASTM International
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Summary
The response of a heat flux gage depends on both the angular distribution of the source radiant flux and the angular sensitivity of the coating on a gage's heat-sensing element. The issue becomes important for the calibration of apparatuses designed to test the response of materials subjected to a known level of incident thermal radiation. In this study, the angular sensitivity of several different gage coatings are measured by rotating the gage sensing surface in front of a black body source. Ideally, gage output is proportional to the cosine of the angle of incidence with respect to the normal, known as Lambertian behavior. Some commercial black coatings become non-Lambertian for angles above 60¿̐ư from the surface normal, but other coatings maintain a Lambertian response beyond 70¿̐ư. The impact of these differences on the calibration of the Fire Propagation Apparatus and the Cone Calorimeter is evaluated.
Dates of Publication and/or Sequential Designation
Volume 2003, Issue 1427 (January 2003)
Subject(s)
Other Subject(s)
ISBN
9780803154773 (e-ISBN)
9780803134515
0803134517
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 3.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2003. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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