Eng. Gheorghe-Marius MARIAN, Prof. Eng. Tudor SAJIN PhD, Prof. Eng. Iulian FLORESCU PhD, Eng. Dragos-Iulian NEDELCU PhD, Eng. Constantin-Narcis OSTAHIE PhD, Eng. Catalin BIRSAN PhD
Rezumat
Pentru un nou concept de microhidrocentrala cu vartej gravitaional i turbina in trepte de rapiditate s-a modelat curgerea apei prin canalul conic in lipsa si in prezenta treptelor. In primul caz, liniile de curent au forma unor elice conice. Viteza axiala si radiala ale apei nu sunt nule doar in stratul limita. In cazul al doilea structura curgerii se modifica cu formarea de turbioane in fiecare spatiu dintre palete. Viteza apei creste rapid pe masura apropierii de orificiul de scurgere si depinde puternic de debitul de apa.
Cuvinte cheie: microhidroenergeticavartej gravitaionalturbina hidraulicarapiditate
Abstract
For a new concept of micro hydropower plant with gravitational vortex and turbine with rapidity steps has been
modeled the water flow through the conical channel in the absence and the presence of steps. In the first case, the power lines appear as conical propellers. Axial and radial velocity of the water are not zero only in the boundary layer. In the second case the structure of the water flow is changes with the formation of swirls every area of the blades. The water velocity increases rapidly as proximity to the drain hole and strongly depends on water flow.
Keywords: micro hydropowergravitational vortexhydraulic turbinerapidity
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