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The paper presents the results of numerical calculations and experimental investigations of free jets under variable turbulence in the jet outlet. The research concerns two cases: the issue of an unstimulated axisymmetric jet to stationary surroundings and the impinge of an unstimulated jet on a flat fixed surface. The results of the numerical calculations have been presented in graphs showing the...
Results of numerical analysis of a turbulent flow in an impinging air jet have been presented. Numerical simulations of a turbulent flow will be compared with measurements data. Results of calculations for different turbulence models have been analyzed. The Phoenics program developed by CHAM Ltd. will be used for numerical calculation. Five different two-equation models of turbulence will be tested...
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...
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...
W artykule przestawiono wyniki analizy numerycznej obejmujące nieizotermiczny przepływ strugi gazu przez płomieniówkę kotła wodnego. Obliczenia numeryczne wykonano z użyciem programu Phoenics 3.1, a wyniki porównano z dostępnymi w literaturze danymi eksperymentalnymi dla stosowanych w przemyśle rozwiązań konstrukcyjnych kotłów. W przytoczonym przykładzie analiza obejmowała przepływ strugi przez płomieniówkę...
W artykule przedstawiono wyniki obliczeń numerycznych i porównano je z danymi eksperymentalnymi dotyczącymi analizy napływu niezawirowanej i niestymulowanej strugi osiowosymetrycznej na powierzchnię płyty usytuowanej w takiej odległości wylotu emitera, przy jakiej zanika rdzeń potencjalny strugi kołowej. Obliczenia numeryczne wykonano z użyciem pakietu Phoenics 3.1, umożliwiającego rozwiązanie układu...
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