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Image: Whether in airplane engines or power plants, turbine blades are often subjected to extremely high temperatures. The blades are cooled internally with cold air flowing through serpentine channels. To enhance the rate of cooling, roughness elements or ribs are place in the channels to generate turbulence. This image shows a small section of a multilouvered fin and the three-dimensional flow features around it. Fins increase the surface area and rate of heat transfer in a system, and multilouvered fins, which are often used in compact heat exchangers, enhance mixing and heat transfer. Instantaneous streamtubes illustrate a coherent vortex jet and its vorticity signature on an x-plane passing through the louver. The software used in producing these simulations was developed under a National Science Foundation grant. <I>[Image 3 of 3 related images; see also, <B>Turbine Vorticity</B> and <B>Velocity Streamtubes</B>.]</I><BR> <BR> <U><B>More about this Image</B></U><BR> This simulation was created by Danesh Tafti and Randy Heiland of the National Computational Science Alliance (NCSA), University of Illinois at Urbana-Champaign, using GenIDLEST computational fluid dynamics software and NCSA VisBench, a visualization system. Research represented in the visualization of the multilouvered fin is supported by the Air Conditioning Refrigeration Center at the University of Illinois at Urbana-Champaign. Thumbnail

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