Design and characterization of a linear Hencken-type burner

We have designed and constructed a Hencken-type burner that produces a 38-mm-long linear laminar partially premixed co-flowdiffusionflame. This burner was designed to produce a linearflame for studies of soot chemistry, combining the benefit of the conventional Hencken burner ’s laminarflames with the advantage of the slot burner ’s geometry for opticalmeasurements requiring a long interaction distance. It is suitable formeasurements using optical imaging diagnostics, line-of-sight optical techniques, or off-axis optical-scattering methods requiring either a long or short path length through theflame. This paper presents details of the design and operation of this new burner. We also provide characterization information forflames produced by this burner, including relative flow-fieldvelocities obtained using hot-wire anemometry, temperatures along the centerline extracted using direct one-dimensional coherent Ramanimaging, soot volume fractions along the centerline obtained using laser-induced incandescence and laserextinction, and transmission electron microscopyimages of soot thermophoretically sampled from theflame.
Source: Review of Scientific Instruments - Category: Physics Authors: Source Type: research