Boulder Fluid and Thermal Sciences Seminar Series

Tuesday, July 10, 2018

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3:30pm-4:30pm (refreshments at 3:15pm)
ECCR 150
Engineering Center
University of Colorado at Boulder

Add to Calendar 07/10/2018 3:30:00 PM 07/10/2018 4:30:00 PM 9 Boulder Fluid and Thermal Sciences Seminar ECCR 150, Engineering Center, University of Colorado, Boulder MM/DD/YYYY

Turbulent Flame Interactions and Applications to Bluff-Body Stabilized Flames

Jacqueline O'Connor The Pennsylvania State University

Interactions between turbulent flames exist in many modern combustion devices, including land-based and aircraft gas turbine engines, jet augmenters, furnaces, and boilers. The interaction between adjacent flames can significantly alter the time-averaged structure and dynamical behavior of flames, including their heat release rate, consumption speed, thermoacoustic response, and blow-off and flash-back limits. In this presentation, we first discuss flame interaction in a realistic combustor configuration, like would be found on a power-generation gas turbine engine. Here, flame interaction can significantly alter the time-average structure of flames. Additionally, this experiment raises a number of important questions about the dynamic behavior of interacting flames. Two more fundamental experiments are discussed to address two critical issues regarding dynamic flame interaction: flow interaction and local flame area annihilation. A three bluff-body experiment is used to discuss the importance of flow interaction and hydrodynamic instability in understanding the dynamics of interacting flames. A two-burner, high-turbulence experiment is used to explore the dynamics of local flame interactions, which are the mechanism by which flame interaction drives changes in macro-level flame behavior. Finally, the presentation concludes with an outlook on future work for these experiments and what fundamental research questions need to be answered in order to predict interacting-flame behavior in real devices.

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Acknowledgment

Support from Herbert and Karen Vogel is gratefully acknowledged through a Vogel Faculty Fellowship at the University of Colorado, Boulder.

Schedule

Location

The seminar is held at the Discovery Learning Center (DLC) at the University of Colorado. Parking is free with a permit, which is provided at the seminar. The location for parking is shown in the map below.

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