A Photoelectric Pyrometer for the Measurement of Luminous Flame Temperatures

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Abstract:

A photoelectric pyrometer has been developed for the measurement of flame temperatures. By means of a photo-multiplier tube covered with an interference filter transmitting a spectral band at 5520, radiant intensities of luminous flames were measured first against a dark background and then with a mirror so placed behind the flame that radiation was redirected, thereby increasing the flame thickness. The photocell filter system was calibrated with radiation from a globar at known brightness temperatures. Application of Wien's and Kirchoff's radiation laws provided a relation between photocell currents and flame temperatures. flame temperatures determined by this method were about 10 to 15 percent lower than temperatures obtained by sodium line reversal, presumably because the integrated optical paths contributing to observed radiant intensities were different in the two cases.

Author(s):
Curcio, J A ; Estes, D V
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC
Funding Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC, WASHINGTON , DC
Document Type:
Technical Report/Interim Report
Publication Date:
1948 Jul 14
Pagination:
16

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution Code:
A - Approved For Public Release
Distribution Statement: Public Release

RECORD

Collection: TRECMS
Identifying Numbers
Report Number(s):
NRL N-3319
Task Number(s):
Problem Number N04-02R
Subject Terms
Modernization Areas:
Microelectronics
Communities of Interest:
Weapons Technologies
Descriptor(s):
measurement, optical pyrometers, photoelectric pyrometers, radiant intensity, pyrometers, equations, accuracy, intensity, absorption, brightness, deflection, emissivity, errors, mirrors, photoelectric cells (semiconductor), radiation, tungsten
Keyword(s):
Luminous Flame Temperatures, photo-multiplier tube, flame thickness, photocell filter system
Subject Categories:
Navigation, Detection and Countermeasures; Physics
Creation Date:
2023 Aug 21
Update Date:
2023 Sep 25