The paper presents a procedure for hydraulic design and analysis of the blade geometry of a high specific speed runner of the Saxo-type double-regulated vertical axial turbine. The meridional through-flow in the passage from the conical guide vane apparatus to the draft-tube elbow is designed by a streamline curvature method (SCM). The design method was validated for numerous operating points including the design duty point with an extensive CFD simulation. The improved SCM design procedure presented in the paper proves to be a robust and accurate tool for the runner blade hydraulic design.
COBISS.SI-ID: 000000
The physical model, the numerical method and the results of our research work on modelling of dynamic response of air valves during pipeline transients are described. Recently obtained experimental data were applied for validation of the special model for description of dynamic response of the air valve. The set of first order partial differential equations was solved with second order characteristic upwind finite difference numerical method, which is based on Godunov’s methods. The results show that appropriate design of air valves prevents and/or mitigates pipeline transients.
COBISS.SI-ID: 11748891