Incipient Behaviour Of Flashback In A Lean Premixed Swirl Burner

Download or read book Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner written by Christopher Eric Schneider and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamics of flame flashback were studied in a lean premixed swirl burner with central bluff-body. A range of conditions with varied flow velocities, inlet temperatures, and hydrogen/methane flow rates were investigated. Intermittent movement of the flame into the feed tube, was found over a range of conditions, with consistent trends as the system moved from stable operation to complete flashback. Statistical analysis of chemiluminescence data showed a strong link between characteristic behaviours of the system, such as the statistical frequency of upstream propagating flame protrusions, and the magnitude of the flashback, independent of the inlet conditions. Effects of conditions on the flashback magnitude and abruptness of transition are described. Existing metrics for predicting flashback were found to be inadequate for describing the observed dynamics. Laser diagnostics revealed only a slight statistical drop in axial flow velocity upstream of the flame, which appeared to strengthen as the flame moved upstream.