Rotary kinetic fluid motors or pumps – Plural runners having different type flow paths
Patent
1997-01-06
1998-07-14
Kwon, John T.
Rotary kinetic fluid motors or pumps
Plural runners having different type flow paths
415914, F04D 1714
Patent
active
057794405
ABSTRACT:
The invention is directed to a flow energizing system for turbomachinery including means for forming a plurality of rotating jet-sheet blades upstream of an impeller and a component for circumferentially varying the blade geometries of the plurality of rotating jet-sheet blades. The a component for forming a plurality of rotating jet-sheet blades includes: impeller shroud 26 having upstream-projecting axial extension 28 attached coaxially with and projecting upstream of shroud 26; recirculation chamber 30 surrounding shroud and axial extension, 26 and 28; recirculation flow inlet 32 formed by a gap between housing 12 and downstream ends, 20a and 26a, respectively, of impeller 20 and shroud 26, for allowing backflow to pressurize recirculation chamber 30; and a plurality of generally axially-extending jet-sheet slots 34 circumferentially distributed around a periphery of axial extension 28 and passing therethrough. The component for circumferentially varying blade geometries of the plurality of rotating jet-sheet blades includes axially-extending stationary liner 36 disposed concentric with and radially inward of axial extension 28 wherein liner 36 is shaped and configured for selectively covering portions of slots 34.
REFERENCES:
patent: 3221661 (1965-12-01), Swearingen
patent: 3435771 (1969-04-01), Riple
patent: 4642023 (1987-02-01), Dunn
patent: 5061151 (1991-10-01), Steiger
Foa, J.V. and C.A. Garris, "Cryptosteady Modes of Direct Fluid-Fluid Energy xchange," in Machinery of Direct Fluid-Fluid Energy Exchange, J.F. Sladky (Editor), American Society of Mechanical Engineers Book AD-7 (New York 1984) pp. 1-13.
Purnell John G.
Stricker John G.
Borda Gary G.
Kaiser Howard
Kwon John T.
The United States of America as represented by the Secretary of
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