Measurements of Soot Temperature in a Diffusion Flame Using a Digital Camera

Title of Document: Measurements of Soot Temperature in a Diffusion Flame Using a Digital Camera Jose Castillo Moreno, Master of Science, 2012 Directed by: Peter B. Sunderland, Associate Professor, Department of Fire Protection Engineering Temperatures were measured in a laminar axisymmetric diffusion flame with a digital camera. The camera was a Nikon D700, modified to remove the Infra-Red (IR) cut filter and the antialiasing filter. Temperatures were obtained using ratio pyrometry at 550, 650, and 900 nm following deconvolution. The camera was calibrated with a blackbody furnace. Measurements were made for an 88 mm high laminar ethylene/air diffusion flame in co-flow on a burner with an 11.1 mm inside diameter. Soot temperatures were measured in the range of 1250 – 2000 K with an estimated uncertainty of ±60 K. The diagnostic requires axisymmetric, optically thin flames, and regions with temperatures greater than 1250 K and soot volume fractions greater than 0.1 ppm. The results agreed with published measurements for this flame. The new diagnostics provide a convenient and economical way to perform these measurements with good accuracy and spatial resolution. MEASUREMENT OF SOOT TEMPERATURE IN A DIFFUSION FLAME USING A DIGITAL CAMERA By Jose Castillo Moreno Thesis submitted to the Faculty of the Graduate School of the University of Maryland, College Park, in partial fulfillment of the requirements for the degree of Master of Science 2012 Advisory Committee: Associate Professor: Peter B. Sunderland, Chair Associate Professor: Andre W. Marshall Associate Professor: Arnaud Trouvé © Copyright by Jose Castillo Moreno 2012