Vaned diffuser with small straightening vanes

Details Vaned diffuser with small straightening vanes Vaned diffuser with small straightening vanes

1988-02-08

1989-10-31

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Vane or deflector

F04D 2944

Patent

active

048773735

ABSTRACT:
An improved vaned diffuser includes primary and secondary curved vanes. The secondary vanes are located radially outward of the leading edges of the primaries. A plurality of secondary vanes is associated with each pair of first row vanes. The camber or curvature of the two rows is opposed. The camber of the second row vanes varies in accordance to the individual vane's proximity to a pressure surface of a primary vane. Flutes may be provided in the hub and shroud walls of the diffuser.

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Abdel-Hamid, "A New Technique for Stabilizing the Flow and Improving the Performance of Vaneless Radial Diffusers", Journal of Turbomachinery, vol. 109, pp. 36-40, Jan. 1987.
Abdelhamid, A. N., "Analysis of Rotating Stall in Vaneless Diffusers of Centrifugal Compressors", The American Society of Mechanical Engineers, Bulletin No. 80-GT-184, Mar. 1980.
Abdelhamid, A. N., "Effects of Vaneless Diffuser Geometry on Flow Instability in Centrifugal Compression Systems", The American Society of Mechanical Engineers, Bulletin 81-GT-10, Mar. 1981.

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