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Porównanie wyników badań eksperymentalnych i numerycznych struktury strugi przepływającej przez komorę nawrotną

Bartoszewicz J.

Journal of Mechanical and Transport Engineering

2013

Vol. 65, No. 2

5--15

W artykule przedstawiono różnice pomiędzy wynikami badań eksperymentalnych i numerycznych. Obliczenia numeryczne wykonano z użyciem pakietu Phoenics, opartego na metodzie bilansu objętości skończonej, a badania eksperymentalne z użyciem anemometru stałotemperaturowego. Celem prezentowanych wyników było wskazanie obszarów znacznie różniących się rozkładem wartości średnich i parametrami turbulencji.

Results of numerical and experimental analysis of turbulent flow in cylindrical chamber will be presented in this paper. Results of calculations for constant: velocities, temperature profiles at nozzle outlet, intensity turbulences and distance between nozzle and impinging wall will be analyzed. For numerical simulation of turbulent flow in cylindrical vessel the Phoenics program developed by CAM Ltd. will be used. For simulation of turbulent flow Phoenics use the standard high-Reynolds-number form of the k-e model, as proposed by Launder and Spalding, with inclusion of allowance for buoyancy effects. The measurement of velocity and its fluctuation was carried out independently of recording pressures based on the СТА anemometer. The standard X probe TSI-1241 was used to measure the two components of velocity. Comparition between numerical and experimental analysis are presented in this paper.

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

Bartoszewicz J., Bogusławski L.

Systems : journal of transdisciplinary systems science

2006

Vol. 11, nr 1

1-7

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.