Total Normal And Total Hemispherical Emittance Of Polished Metals
Report Number: WADD TR 61-94 Author(s): G. L. Abbott, N. J. Alvares, W. J. Parker Corporate Author: Naval Radiological Defense Laboratory Date of Publication: 1961-11 Pages: 48 AD Number: AD0270470Contrails does not possess a copy of this report. Click here to offer Contrails a donation of this report
Abstract: The objective of this research is to determine the ratio of the total hemispherical to total normal emittance for various classes of surfaces in order to find correlation factors between the total normal emittance usually measured and the total hemispherical emmitance which is of importance in heat transfer problems. Measurements were made on polished Pt between 800 and 1500 K. The total hemispherical emittance was obtained from the electrical power dissipation in an electrically heated strip suspended in a vacuum of better than 0.0001 mm Hg and its absolute temperature measured by a thermocouple. The total normal emittance was determined with a radiation thermopile. The ratio of total hemispherical to total normal emittance was calculated directly from the angular distribution of radiation obtained by revolving the detector about an axis through the ribbon. The total emittance of polished platinum was given to within + or - 5%. Data were taken on the spectral emittance at 0.65 microns and on the electrical resistivity. Observations were made on the various measured quantities with time.
Other options for obtaining this reportVia the Defense Technical Information Center (DTIC): A record for this report, and possibly a full-image download of the report, exists at DTIC Via National Technical Information Service: This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library Indications of Public Availability No digital image of an index entry indicating public availability is currently available There has been no verification of an indication of public availability from an inside cover statement
This report has the following parts/volumes:
Total Normal And Total Hemispherical Emittance Of Polished Metals - Part II
WADD TR 61-94 Part 2
Total Normal and Total Hemispherical Emittance of Polished Metals. Part III.
WADD TR 61-94 Part 3