Patent ID: 7476082
Filing Date: 2009-01-13
Classification: F01D,F05D,Y10S

Abstract:
1. A turbine wheel that comprises a plurality of turbine blades wherein each turbine wheel blade comprises: an inducer portion outer edge that extends from a lowermost point at a backdisc of the turbine wheel and that forms an angle of less than 50° with a rotational plane of the backdisc wherein an angle of 0° corresponds to direction of rotation of the backdisc in the rotational plane; wherein the angle is defined by a line tangent to the inducer portion outer edge at the lowermost point; wherein the inducer portion outer edge has a critical point; and wherein the critical point and the lowermost point are separated by at least 26° in the rotational plane to thereby, during rotation of the turbine wheel, reduce noise generated by the inducer portion of the outer edge as it passes by an edge of a vane that directs exhaust to the inducer portion of the outer edge.