DORIAN NEDELCU, VASILE COJOCARU, LAVINIA MADALINA MICU, DANUT FLOREA, MIHAI HLUSCU USING OF POLYMERS FOR RAPID PROTOTYPING OF AN AXIAL MICROTURBINE RUNNER AND WICKED GATES Hydraulic turbine components that define the water flow, generally have a complex geometry. In the design of these components a major role is played by model tests. The complex geometry of runnerís blades and wicked gates determines high manufacturing times and high fabrication cost if they are made by classical manufacturing technologies (casting, machining on numerically controlled machines). The use of high resolution 3D printing reduces the production time, simplifies the manufacturing technology and generate high dimensional accuracy. The paper presents the design and the manufacturing process of the components from a new solution of axial hydroturbine, equipped with a permanent magnet generator and an immersed runner. The manufacturing of the main parts of the turbine (runner and wicked gates) it was made by Rapid Prototyping.