Infrared Temperature Measurements of Gas and Dust Explosions.
Cashdollar KL; Hertzberg M
Pres 6th Symp on Temperature Washington D c March 14-18 1982 1982 Mar; 5:453-463
This paper presents temperature measurements of gas and dust explosions. Instrumentation used includes a commercial rapid-scan spectrometer and two multiwavelength infrared pyrometers developed at the Bureau of Mines. The rapid-scan spectrometer has a wavelength range of 1.7 to 4.8 Um and a maximum rate of 800 scans per second. One of the pyrometers is a three-wavelength, near- infrared instrument with a time response of about 20 usec, and it measures continuum radiation from particles in the flame at wavelengths of 0.8, 0.9, and 1.0 Um. The second infrared pyrometer measures continuum radiation from hot particles at four wavelengths (1.6, 2.3, 3.8, and 5.0 Um) and band emission from carbon dioxide gas at 4.4 and 4.6 Um. It has a time response of about 25 usec. Temperatures for small- and large-scale methane-air explosions were measured with the rapid-scane spectrometer, based on the absolute radiance and on emission-absorption measurements using a blackbody source. Measurements of both gas and dust temperatures for small- scale dust explosions were made with the rapid-scan spectrometer and the two pyrometers. The two pyrometers have also been used to make temperature measurements within full-scale mine coal dust explosions.
Pres. 6th Symp. on Temperature, Washington, D.c., March 14-18, 1982, V. 5, 1982, PP. 453-463