ROLLER-SHAPED RUNNER OF A CROSS-FLOW TURBINE

The present invention relates to a roller-shaped runner (20) of a cross-flow turbine (1) through which a flow can pass radially from outside to inside and then radially from inside to outside. The runner (20) has a shaft (22) with at least two end disks (40) arranged on the shaft (22) at the ends and a plurality of intermediate disks (30) that are secured to the shaft (22) between the end disks (40). The end disks (40) and the intermediate disks (30) define radial planes relative to the shaft (22). Furthermore, the end disks and intermediate disks (30) each have a plurality of radially outwardly arranged slots (32) in which is secured, in each case in one slot (32) of two end disks and multiple intermediate disks (30), a profiled blade (50) running parallel to the shaft (22), so that the shaft (22) is surrounded, at a radial distance, by a ring of profiled blades (50). The roller-shaped runner (20) has an outer diameter D and a length L, where 0.08