A THEORETICAL-STUDY OF THE PERFORMANCE OF AN AXIAL-FLOW TURBINE FOR AMICROHYDRO INSTALLATION

The Bernoulli-with-loss equation, with the losses represented by a con stant times the velocity head, has been applied to each section of the flow through a small turbine system consisting of inlet guide vanes, axial flow turbine and draft tube. Using experimental data and the set s of equations, the flow angles around the turbine blades and the loss coefficients in the turbine and in the draft tube were determined. Th ese were used to predict the effect of varying the guide vane angle an d the turbine blade angle on performance. They were also used to predi ct the effects on the performance of a geometrically similar prototype system.