Vortical structure of reacting flow in a sudden-expansion combustor with solid fuel
Journal
Journal of Propulsion and Power
Journal Volume
25
Journal Issue
5
Pages
1145-1147
Date Issued
2009
Author(s)
Abstract
A study was conducted to experimentally investigate vortical structures of nonpremixed reacting flow within a sudden-expansion combustor. The reacting flow was made available by pygoren ignition of the polymethylmethacrylate (PMMA) slab. The nonreacting case was demonstrated first as the basis for comparison to reveal the vortical structure of the reacting flow within the combustor. Small eddies were spread downstream while forming into larger coherent structures, which was attributed to the flapping shear layer and the potential of vortex pairing. The proceeding combustion introduced large vortical structures along the heated oxidizing stream for the nonpremixed reacting case. The mixing between the oxidizing stream and fuel vapor was assisted by the large vortices that was verified by the distinct distributions of seeding particles. The concept of vorticity thickness was also introduced to evaluate the difference between the mixing layers in nonreacting and reacting flows.
SDGs
Type
journal article