Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent
1976-06-01
1978-03-21
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
416237, F01D 514
Patent
active
040801020
ABSTRACT:
A moving blade row of high peripheral speed for thermal axial flow turbo machines, especially for the last stage of condensing steam turbines, the blades of which, when viewed in a radial direction, have their middle and outer regions located in the range of transonic flow. The blade section in the middle range or in the middle and outer regions starting from the trailing edge is formed by two straight lines. The straight line at the suction surface side joins the steadily curved curve of the remaining suction surface side without any distinctive bend, whereas the straight line at the pressure surface side near the trailing edge of the blade joins the steadily curved curve of the remaining pressure surface side with a distinctive bend or discontinuity.
REFERENCES:
patent: 874993 (1907-12-01), Rice
patent: 1504710 (1924-08-01), Roberts
patent: 1553627 (1925-09-01), Nagler
patent: 2918254 (1959-12-01), Hausammann
patent: 3820918 (1974-06-01), Goldstein
Becker Walter
Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
Powell Jr. Everette A.
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