Air cycle machine compressor diffuser

摘要

A diffuser for an air cycle machine defines airflow both to a compressor rotor from the inlet and from the compressor rotor through a plurality of vanes that define radially extending airflow passages. The size and shape of both the inlet and the vanes of the diffuser define and tailor the character of airflow presented to and leaving the compressor rotor to provide a desired change in air flow.

主权项

1. A compressor diffuser comprising:
a hub defining an inlet for airflow disposed about an axis; a diffuser portion extending radially outward from the hub portion, the diffuser portion including a plurality of vanes defining curved radial passages for communicating airflow radially outward, each of the plurality of vanes including a first height at a radially innermost portion of each of the plurality of vanes and a second height at a radially outermost portion of each of the plurality of vanes, with a ratio of the second height to the first height between 1.37 and 1.48, wherein the diffuser portion defines a back side opposite the plurality of vanes, the back side including a plurality of boss pads spaced circumferentially about a periphery of the diffuser portion.