Published 4 issues per year
ISSN Print: 1065-3090
ISSN Online: 1940-4336
Indexed in
VISUALIZATION OF IMPINGEMENT FLOWS IN A CHAMBER WITH MULTIPLE INLETS
ABSTRACT
Three-dimensional flow structures in a combustor with one axial-inlet and two side-inlets are studied by means of flow visulization techniques of tracer injection in a water tunnel and oil film in a wind tunnel The Reynolds numbers based on the combustor height and bulk mean velocity are 6.0 × 103 and 5.9 × 104 for the former and the latter visualization methods, respectively. From the visualized results, the instantaneous three-dimensional main vortical structures are identified, and time-averaged near-wall flow structures are characterized using the topological node point, saddle point, focus, and horseshoe vortex structures. Moreover, the effects of the momentum ratio (0.02 to 0.5) of the axial-inlet jet to side-inlet jets are qualitatively examined in terms of penetration ability of the axial jet and size of horseshoe vortices.