On the Influence of the Centrifugal Force on the Performance of a Radial Axial Turbine

Abstract

The forces acting on the blades of a radial axial turbine and the fluid are analyzed for introduction of the flow into the turbine from outside at an angle relative to a direction of the peripheral speed. The tilt angle of the blade is considered to be constant relative to the wheel radius. The influence of the centrifugal force, for which a certain amount of potential energy of the fluid is needed to be overcome, is estimated. Fluid velocity and blade velocity along with the fluid pressure on a turbine blade and the pressure exerted by the centrifugal force on the fluid are presented as functions of the initial fluid velocity and the peripheral speed of the turbine for different tilt angles of the blade and different flow directions.