Radial turbine wheel, radial turbine, and turbocharger

Abstract

This radial turbine wheel comprises: a hub configured to be fixed to a rotating shaft; and a plurality of turbine blades disposed at intervals in the circumferential direction on a hub surface of the hub. Each of the plurality of turbine blades includes a leading edge, a hub-side edge, and a shroud-side edge. The leading edge has a leading-edge hub side end connected to the hub-side edge, and a leading-edge shroud side end connected to the shroud-side edge. When the entire length of the leading edge in a span direction is defined as La and the span-direction distance between a position displaced from the leading-edge hub side end toward the leading-edge shroud side end in the span direction and the leading-edge hub side end is defined as Ls, the leading edge of at least one of the plurality of turbine blades is configured to have a blade thickness that continuously decreases as Ls/La increases from 0.2 to 1.0.

Dependencies are inferred from the claim text.