Influence of turbulence intensity changes at the nozzle outlet on the structure of a turbulent flow in a reverse chamber

• Autorzy: Bartoszewicz J. , Bogusławski L.

Warianty tytułu

PL

Wpływ zmian stopnia turbulencji w przekroju wylotowym dyszy na strukturę płynu w komorze nawrotnej

• Języki publikacji: EN

Abstrakty

EN

Analysis of influence of the inflow turbulence on the change of a flow in a cylindrical vessel and transport coefficients on its surface will be presented. Results of calculations for different intensity of turbulence at the nozzle outlet will be analyzed. For numerical simulation of a turbulent flow in a cylindrical vessel the Phoenics program, developed by CAM Ltd., was used. The k- turbulence model proposed by Launder and Spalding is used for these simulations. Results of the numerical analysis for average velocity, temperature, pressure, kinetic energy of turbulence and the rat of dissipation of kinetic energy of the turbulence of the flow and thermal parameters on the wall are presented. Distribution of such values for many variants of the entrance intensity of the turbulence is shown in a graphical form. Numerical calculations are carried out for a cylindrical chamber of the length of about 10D and radius 5D, where D = 0.01 meter is the diameter of the nozzle.

Słowa kluczowe

EN

turbulence; numerical analysis

PL

turbulencja; dysza; komora nawrotna; przepływ; analiza numeryczna

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems : journal of transdisciplinary systems science
• Rocznik: 2006
• Tom: Vol. 11, nr 1
• Strony: 1--7
• Opis fizyczny: bibliogr. 9 poz.

Twórcy

autor

Bartoszewicz J.

autor

Bogusławski L.

• Poznań University of Technology, Chair of Thermal Engineering

Bibliografia

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• [4] EL-AMIN M.F., HEIDEMANN W., MUELLER-STEINHAGEN H., Turbulent jet low into a water store, Heat SET 2005 Conference, Grenoble, France, 2005, 345-349.
• [5] KNUDSEN, S., FURBO, S., AND SHAH, L.J., Design of the Inlet to the Mantle in a Vertical Mantle Storage Tank, Proc. of ISES 2001 Solar World Congress, Adelaide, South Australia, 2001.
• [6] LAUNDER, B. E., AND SPALDING, D.B., Mathematical models of turbulence, Academic Press, 1972.
• [7] LAUNDER, B. E., AND SPALDING, D.B., The numerical computation of turbulent flows, Comp. Meth. in Appl. Mech. & Eng., 1974, Vol. 3, 269.
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