Impeller for radial flow centrifugal compressor

F - Mech Eng,Light,Heat,Weapons – 04 – D

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230/132, 26/148

F04D 29/28 (2006.01)

Patent

CA 1055453

ABSTRACT OF THE DISCLOSURE An impeller blank for a centrifugal compressor has impeller blades with inducer sections of parabolic contour extending n a generally axial direction from generally radial sections of the blades. The angle of the work- ing surface of each inducer section with respect to a plane at right angles to the impeller axis varies inversely with diameter and with the axial dimension of the inducer section from the radial section. The inducer sections are cut to a diameter for minimum gas velocity with respect to the impeller, a function of gas flow rate and impeller speed, and are cut axially for an inlet angle which is a function of the ratio of axial to peripheral gas velocity to achieve flow nearly parallel with the working surface of the inducer section.

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