Large eddy simulation of the flow through the blades of a swirl generator

✍ Scribed by Stephen Conway; Doru Caraeni; Laszlo Fuchs

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 972 KB
• Volume: 21
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(00)00058-8

✦ Synopsis

Subsonic turbulent ¯ow between the blades of a swirl generator is considered using large eddy simulations (LES). The boundary layer exhibits transition in the upstream parts of the blade. Further downstream, the ¯ow separates both on the suction and the pressure surfaces. In the boundary layer, one may note the streaky vortices. In addition, due to the blade surface curvature large, time-dependent streamwise vortices are formed. The wake of the blades also contains large scale, time-dependent structures. These phenomena are captured directly by LES. In our study, we use two dierent subgrid scale (SGS) models: the ®rst model is an implicit model and the second is a novel dynamic model dubbed the dynamic divergence model (DDM). The eects of the SGS model and the grid resolution are also investigated.