Určení tlakové ztráty na tvarovkách v potrubí s využitím numerického modelování

Abstract

In my thesis I deal with laboratory measurements and numerical modeling of local losses in a pipe fittings. The beginning of the thesis is devoted to the theory of local losses especially in case of sudden expansion and contraction of the pipe cross-section and definition of the loss coefficient is described. In the next section the results obtained from laboratory measurements are evaluated. Experimental investigation was carried out at the Department of Hydromechanics and Hydraulic Equipment. All obtained data and functions are presented in tables and graphs. Value of local losses I evaluated for inlet and outlet velocity. In another part numerical modeling is performed based on the laboratory measurement. The definition of geometry and generation of the model grid is described at the beginning of the numerical modeling. At the conclusion of the thesis the loss coefficients obtained by laboratory measurements and numerical modeling are compared with the values reported in the literature.