- Author
-
Cashdollar, K. L.
|
Hertzberg, M.
- Title
- Infrared Temperature Measurements of Gas and Dust Explosions.
- Coporate
- Bureau of Mines, Pittsburgh, PA
- Journal
-
Temperature,
Vol. 5,
453-463,
1982
- Keywords
-
temperature measurements
|
dust explosions
|
instruments
|
gas explosions
- Abstract
- This paper presents temperature measurements of gas and dust explosions. Instrumentation used includes a commercial rapid-scan spectrometer and two multi-wavelenght infrared pyrometers developed at the Bureau of Mines. The rapid-scan spectrometer has a wavelenght 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 u sec, and it measures continuum radiation from particles in the flame at wavelengths of 0.8, 0.9, and 1.0 u m. The second infrared pyrometer measures continuum rdiation from hot particles at four wavelengths (1.6, 2.3, 3.8, and 5.0 u m) and band emission from carbon dioxide gas at 4.4 and 4.6 u m. It has a time response of about 25 u sec. Temperatures for small and large scale methane-air explosions were measured with the rapid-scan 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.