A Photoelectric Pyrometer for the Measurement of Luminous Flame Temperatures
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 14, 1948
- Accession Number
- AD1207905
Entities
People
- D. V. Estes
- J. A. Curcio
Organizations
- United States Naval Research Laboratory