The paper deals with a hydraulic design of an axial propeller in function of pump and in function of turbine as well. A meridional cut of a turbo machine is proposed by classical method following guiding parameters.. Experimental findings about an interaction between parameters of the turbo machine in pump an turbine mode are implemented in this procedure. Blade cuts are proposed following NACA airfoils with using of their aerodynamic characteristics, which are processed numerically. Also Voznesensky diagram, which is used to predict an influence of an airfoil in a blade grid was processed numerically as well. The result is a complete design with text-file output, which is directly capable to be used as an input for 3D environment (e.g. CATIA). and Obsahuje seznam literatury a seznam symbolů
The paper deals with a modeling of a flow in hydraulic parts of a turbo machine operating in a pump and in a turbine mode. The results are Q-H (Q-Y) performance characteristics of the pump operating in both modes. An important piece of knowledge is a shift of the pump‘s and turbine‘s BEP and the change of specific speeds of the turbo machine in a pump and in a turbine mode, which emerges from it. The goal of this paper was to find a shift of pump‘s and turbine‘s BEP and to obtain information about hydraulic efficiency of the pump operating in a pump and turbine mode. Anyway the aim of CFD simulation is to evaluate Q-H (Q-Y) characteristic from the point of view of a stability of Q-H curve. The analysis of flow patterns in the impeller and in the vane diffuser in a pump and turbine mode is a valuable contribution to the topic of a hydraulic interaction between an impeller and a vane diffuser. and Obsahuje seznam literatury