UNSTEADY FREE CONVECTION IN A VERTICAL CHANNEL WITH A BUILT-IN HEATED SQUARE CYLINDER |
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| Authors: | A K Saha |
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| Affiliation: | 1. Department of Mechanical Engineering , University of Florida , Gainesville, Florida, 32611;2. SCRAM Technology, Inc , 18 Dunwoodie Road, Glenmont, New York, 12077 |
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| Abstract: | The cause of high operating temperatures experienced by grate blocks in a waste-to-energy power plant is investigated. A three-dimensional numerical analysis is performed to assess convection from the grate to the underfire air supply and conduction within the grate. A number of geometric complexities, including variable solid thickness, extended surfaces, sharp curvatures, and narrow passages, are accounted for via a finite element approach. The grate temperature is found to be very sensitive to the flow characteristics beneath the grates. Analysis of a modified grate structure was performed, showing a 14% reduction in maximum grate temperature. |
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