Numerical Calculation of the Cold-Flow Characteristics of a Bluff-Body Flame Stabilizer

摘要

The numerical prediction of turbulent flow behind a wedge-shaped flame stabilizer is described. The wedge is represented as a blockage in the flow. A model of turbulence characterized by the turbulence energy and a measure of the time-mean-square of the vorticity fluctuations is employed. The flow situations include cases with and without a nozzle upstream of the bluff body that simulates a lean-mixture combustor. Results based on these features are compared with the data for a 45 deg wedge angle. The predicted and measured size of the recirculation zone, mean velocity, pressure coefficients, shear stresses and turbulence energy are in fair agreement downstream of the stabilizer.