Assessment of turbulence modeling for engineering prediction of swirling vortices in the near burner zone
Abstract
Measurements and computations of a number of isothermal swirling flows are reported. The focus is on two categories of swirling flows: high confinement flows in geometries representative of gas turbines and low confinement flows encountered in industrial and experimental furnaces. The flow geometries consisted of a solidbody vortex generator, a burner quarl, and a cylindrical furnace. The measurement techniques utilized are discussed, with emphasis on measurement errors. In order to identify the flow features that the computer models are expected to predict, the physics of the flows is treated in detail. In the finite difference computations, three models of turbulence were tested: a Reynolds stress model (RSM), an algebraic stress model (ASM), and the kepsilon model. A major conclusion is that reliable predictions of swirling vortices that were originally in solidbody rotation can be made, if fine numerical grids are used in conjunction with the QUICK method and either the RSM or the ASM.
 Publication:

International Journal of Heat and Fluid Flow
 Pub Date:
 September 1990
 DOI:
 10.1016/0142727X(90)900419
 Bibcode:
 1990IJHFF..11..225W
 Keywords:

 Burners;
 KEpsilon Turbulence Model;
 Prediction Analysis Techniques;
 Swirling;
 Vortex Generators;
 Combustion Chambers;
 Flame Stability;
 Gas Turbines;
 Particle Laden Jets;
 Reynolds Stress;
 Fluid Mechanics and Heat Transfer