Prediction of turbulent flow separation in conical diffusers

• Autorzy: Jesionek K. J.

Warianty tytułu

PL

Przewidywanie oderwania przepływu turbulentnego w dyfuzorach stożkowych

• Języki publikacji: EN

Abstrakty

EN

The prediction of the flow conditions in diffusing passages has long been a major unsolved problem fluid mechanics. The chief complicating effect is the presence of the large adverse pressure gradient, whose exact influence on the velocity distribution has defied mathematical analysis. In the paper, the method of flow-separation forecasting for steady, incompressible flows without swirl in axisymmetrical conical diffusers has been described. The separation conditions are shown to depend on the shear stress distribution inside of the turbulent boundary layer. Comparisons between the predictions of boundary-layer theory and the actual data of diffuser passages are given.

PL

W pracy opisano metodę przewidywania oderwania strumienia od ścianki kanału dla ustalonego, nieściśliwego przepływu bez zawirowań, w przepływie symetrycznym, w dyfuzorze stożkowym. wykazano, iż warunki oderwania przepływu zależą od rozkładu naprężeń stycznych w turbulentnej warstwie przyściennej. Przedstawiono porównanie obliczeń wykonanych na podstawie teorii warstwy przyściennej, z danymi eksperymentalnymi dla kanałów dyfuzowych.

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 1998
• Tom: nr 104
• Strony: 105--117
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Jesionek K. J.

• Wrocław University of Technology, Institute of Heat Engineering and Fluid Mechanics, Turbomachinery Department

Bibliografia

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