Flame Propagation and Blowout in Hydrocarbon Jets: Experiments to Understand the Stability and Structure
Final rept. 1 Jun 2008-31 May 2012
NORTH CAROLINA STATE UNIV AT RALEIGH
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This research supported by the U.S. Army Research Office examines a myriad of facets of lifted hydrocarbon jet flames in the presence of air co-flow. At a certain jet exit velocity, a flame will lift from the fuel nozzle and stabilize at some downstream position. The partially-premixed flame front of the lifted flame oscillates, with the oscillations becoming greater in flames stabilized further downstream. These oscillations are also observed in flames where blowout is imminent. Research progress has been made in a flame blowout in diluted jets and confined co-flow systems, b flame hysteresis in diluted and confined jets, c reacting jets in air cross-flows to examine the nature of the stability characteristics and d electrostatic flow control, that has potential for combustion control applications. The research has involved both undergraduate and graduate students, and has been published in the literature.
- Combustion and Ignition