title: Thin-filament pyrometry with a digital still camera.
abstract: A novel thin-filament pyrometer is presented. It involves a consumer-grade color digital still camera with 6 megapixels and 12 bits per color plane. SiC fibers were used and scanning-electron microscopy found them to be uniform with diameters of 13.9 micro m. Measurements were performed in a methane-air coflowing laminar jet diffusion flame with a luminosity length of 72 mm. Calibration of the pyrometer was accomplished with B-type thermocouples. The pyrometry measurements yielded gas temperatures in the range of 1400-2200 K with an estimated uncertainty of +/-60 K, a relative temperature resolution of +/-0.215 K, a spatial resolution of 42 mum, and a temporal resolution of 0.66 ms. Fiber aging for 10 min had no effect on the results. Soot deposition was less problematic for the pyrometer than for the thermocouple.
authors.affiliation: Department of Fire Protection Engineering, University of Maryland, College Park, MD 20742, USA.
authors.forename: Jignesh D
authors.initials: JD
authors.lastname: Maun
authors.forename: Peter B
authors.initials: PB
authors.lastname: Sunderland
authors.forename: David L
authors.initials: DL
authors.lastname: Urban