Research Projects:
- Large Eddy Simulation of a Bluff Body Stabilized Flame With Close-Coupled Liquid Fuel Injection:
Large eddy simulations (LES) are performed of a bluff body stabilized flame with discrete liquid fuel injectors located just upstream of the bluff body trailing edge in a so-called “closecoupled” configuration. Non-reacting and reacting simulations of the Georgia Tech single flameholder test rig are conducted using an Eulerian-Lagrangian approach with a finite volume solver. Experimental data is first used to characterize the boundary conditions under non-reacting conditions before simulating reacting test cases at two different fuel mass flow rates. The two fuel mass flow rates not only result in different global equivalence ratios but different spatial distributions of fuel especially in the near-field wake of the bluff body. The differing spatial distribution of fuel results in two distinct flame dynamics; at the high fuel flow rate large scale sinusoidal Bérnard/von-Kármán (BVK) oscillations are observed whereas a symmetric flame is seen under the low fuel flow rate condition.