An internally ventilated brake disc cooling air flow enhancement arrangement is provided. Between a radially inner region of a brake disc that includes brake disc-to-axle hub mounting elements and cooling vanes between the parallel friction rings of the brake disc there are provided cooling air flow-modifying features. The flow-modifying features are circumferentially arranged around the radially inner region and are sized, shaped and positioned in a manner that deflects cooling air entering the internally ventilated brake disc in the radially inner region toward the entrances of cooling channels between the vanes to increase cooling air mass flow and thereby increase heat transfer an removal from the brake disc.