Machine Parts

  Deriaz Turbine which is a reaction turbine. It is also known to as a diagonal turbine. P. Deriaz who is the inventor of Deriaz Turbine. By following his name it’s name is Deriaz   Turbine. This turbine intermediate between the mixed flow and the axial flow turbines, because the flow of water as it passes through the runner is at an angle of 45 °C   to axis. Deriaz   Turbine has some features which is given bellow them: a.        The casing of the turbine is so shaped that there is only small clearance between the blade tips and the casing to reduce leakage loss. b.       Guide vanes are provided ahead of the blades to the regulate and direct flow. c.        It can be employed for heads varying from 30 m to 150 m. d.       The runner has no outer rim connecting all the blades as these blades are movable. e.        The blades of runner are provided to the hub and unlike in the Kaplan turbines, the axes of the blades are inclined to the axis of shaft. The direc