Patent ID: 8454316
Filing Date: 2013-06-04
Classification: F04D

Abstract:
1. A radial blade wheel comprising: a first and a second end plate arranged at a mutual distance from each other, the first end plate having an opening which allows inflow to the radial blade wheel, and blades arranged between the first and the second end plate and joined to the first and the second end plate, whereby the outer edges of the blades as well as the first and the second end plate delimit openings allowing outflow from the radial blade wheel, wherein the radial blade wheel comprises: an inner part with blades, in which curvature of the blades is shaped to bring motion energy to the flowing particles while the radial blade wheel is rotating, and an outer part with blades, in which curvature of the blades is shaped not to bring motion energy to the flowing particles while the radial blade wheel is rotating, wherein the curvature of the blades in the outer part with blades is shaped in such a way that U*Cu=constant, wherein U is the peripheral velocity and Cu is the absolute velocity of a particle along the blade, projected in the direction of the peripheral velocity.