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

• Autorzy: Wróblewska A. , Bartoszewicz J. , Bogusławski L.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

heat transfer; model of turbulence; short smoke tube; turbulence

PL

model turbulencji; płomieniówka; turbulencja; wymiana ciepła

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2006
• Tom: Vol. 27, no. 4
• Strony: 235--244
• Opis fizyczny: Wz., wykr.,Bibliogr. 5 poz.,

Twórcy

autor

Wróblewska A.

autor

Bartoszewicz J.

autor

Bogusławski L.

• Poznań University of Technology, Chair of Thermal Engineering, Piotrowo 3, 60-965 Poznań, Poland

Bibliografia

• [1] BOETLER L.M.K., YOUNG G., IVERSEN H.W.; An Investigation of Aircraft Heaters XXVII - Distribution of Heat Transfer Rate in the Entrance Section of Circular Tube, NACATechnical Note 1451, 1948.
• [2] MICHIEJEV M. A.: The average heat transfer at fluid flow in pipes, in: Heat Transfer and Thermal Modelling, Izd. AN SSSR, Moskva, 1959 (in Russian).
• [3] ROSTEN H.I., SPALDING D.B.: The Phoenics beginners guides, CHAM Report NOTR100, CHAM Limited, Wimbledon, England, 1985.
• [4] WOJTKOWIAK J.: Laminar axially symmetrical flows with a large concentric obstruction, Wydawnictwo Politechniki Poznańskiej, Rozprawa nr 344, Poznań, 1999 (in Polish).
• [5] WRÓBLEWSKA A.: Intensification of heat transfer in a racing part of a deformed tube, PhD Thesis, Poznan University of Technology Poznań, 2005.