CENTRIFUGAL COMPRESSOR IMPELLER WITH NON-LINEAR LEADING EDGE AND ASSOCIATED DESIGN METHOD

摘要

A centrifugal compressor impeller comprises a gas inlet, a gas outlet, and a disc having a plurality of blades extending therefrom. Each blade has a leading edge at the impeller inlet and a trailing edge at the impeller outlet, a blade base extending along the disc between the leading edge and the trailing edge, a blade tip extending between the leading edge and the trailing edge opposite the disc, a pressure side and a suction side. Each blade has a three-dimensional curvature in at least a portion of the surface, adjacent the leading edge. The leading edge has a curved, non-linear profile in a meridian plane. The blade portion has a double-curvature. Each blade has a first metal angle distribution at the blade base, a second metal angle distribution at the blade tip and at least a third metal angle distribution between the blade base and the blade tip.

主权项

1. A centrifugal compressor impeller comprising:
a gas inlet; a gas outlet; a disc having a plurality of blades extending therefrom, each blade being comprised of: a leading edge at the inlet; a trailing edge at the outlet; a blade base extending along the disc between the leading edge and the trailing edge; a blade tip extending between the leading edge and the trailing edge opposite the disc; a pressure side; and a suction side; wherein:
the leading edge of each blade has a curved, non-linear profile in the meridian plane;starting at the leading edge and for at least a blade portion, each blade has a first metal angle distribution at the blade base, a second metal angle distribution at the blade tip and at least a third metal angle distribution at an intermediate location between the blade base and the blade tip; andthe third metal angle distribution is selected as a function of the non-linear profile of the leading edge, the blade portion having a double curvature.