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Intensification of heat transfer on a deformed surface of a short smoke tube

Wróblewska A., Bartoszewicz J., Bogusławski L.

Archives of Thermodynamics

2006

Vol. 27, no. 4

235-244

The purpose of this paper is to give a description of heat transfer phenomena which take place during the flow of fluid in short smoke tubes with deformations in a form of symmetric over press with an assumed pitch and rotated by 90[degrees]. Possibilities to obtain information, which enables obtaining a reliable description of heat transfer in such geometry have been analyzed. Information concerning distributions of heat transfer can be used for designing boilers with extended heat transfer surface. The Phoenics code, which consist of a set of momentum, mass and energy transport equations complimented with a turbulence model and wall functions, was used. The results of the numerical calculations were verified by experimental investigations. Results of numerical analysis are consistent with experimental data. Distributions of a local value of flow characteristics in analyzed geometry have been presented. Analyzed form of the tube deformation intensified heat transfer phenomena in a noticeable way.