US5730580A
Expired / Lapsed
US
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Turbomachines having rogue vanes
Assignee: Concepts ETI Inc
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Filing: 1995-03-24
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Granted: 1998-03-24
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Expires: 2015-03-24
Abstract
Abstract A turbomachine has a set of vanes in the airfoil cascade of its diffuser system. A first portion of the vanes are "rogue" vanes. A second portion of the vanes are "remaining" vanes. For a given flow through the vane set, the angle of incidence of the rogue vanes differs from the angle of incidence of the remaining normal vanes. The remaining vanes may be free-floating or positionable. The rogue vanes can be fixed or scheduled to dominate flow through the diffuser system, thereby improving efficiency of operation. Optionally, additional "intermediate" vanes can be disposed between the "rogue" vanes and the "remaining" vanes. In a centrifugal pump or compressor, the "rogue" vanes are positioned such that a preponderance of the flow will proceed through the impeller, subsequently through the rogue vanes, and then smoothly into the volute so that flow will pass smoothly through the system with minimum frictional effects and maximum pressure recovery. For centrifugal or axial turbomachines, the use of one or more sets of rogue vanes creates a "channelizing" effect of the flow throughout the entire turbomachine.
Inventors
- 👤 David Japikse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:12
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/165; F04D27/00; F04D27/02; F04D27/0246; F04D29/445; F04D29/448; F04D29/52; F04D29/54; F04D29/56; F04D29/563; F05; F05D; F05D2220/00; F05D2220/40
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
60 words
Turbomachine, comprising: a vane set including a plurality of vanes disposed in a circular row, a first portion of the vanes being rogue vanes, a second portion of the vanes being normal vanes; wherein: for a given flow through the vane set, the angle of incidence of the rogue vanes differs from the angle of incidence of the normal vanes.
Claim 2
Dependent Claim
60 words
Turbomachine, comprising: a vane set including a plurality of vanes disposed in a circular row, a first portion of the vanes being rogue vanes, a second portion of the vanes being normal vanes; wherein: for a given flow through the vane set, the angle of incidence of the rogue vanes differs from the angle of incidence of the normal vanes.
Claim 3
Dependent Claim
17 words
Turbomachine, according to claim 1, wherein: the first portion of vanes includes at least one rogue vane.
Claim 4
Dependent Claim
22 words
Turbomachine, according to claim 1, wherein: the rogue vanes establish a channelized flow through the vane set and through adjacent rotor blading.
Claim 5
Dependent Claim
23 words
Turbomachine, according to claim 1, wherein: the rogue vanes are set to dominate flow through the vane set relative to the normal vanes.
Claim 6
Dependent Claim
18 words
Turbomachine, according to claim 1, wherein: the rogue vanes are set for higher flow than the normal vanes.
Claim 7
Dependent Claim
13 words
Turbomachine, according to claim 1, wherein: the turbomachine is a radial flow turbomachine.
Claim 8
Dependent Claim
13 words
Turbomachine, according to claim 1, wherein: the turbomachine is an axial flow turbomachine.
Claim 9
Dependent Claim
20 words
Turbomachine, according to claim 1, wherein: the rogue vanes control operating characteristics of the turbomachine under conditions of reduced flow.
Claim 10
Dependent Claim
20 words
Turbomachine, according to claim 1, wherein: the rogue vanes control operating characteristics of the turbomachine under conditions of partial admission.
Claim 11
Dependent Claim
20 words
Turbomachine, according to claim 1, wherein: the rogue vanes control operating characteristics of the turbomachine under conditions of partial emission.
Claim 12
Dependent Claim
14 words
Turbomachine, according to claim 1, wherein: the vane set is disposed between two walls.
Claim 13
Dependent Claim
14 words
Turbomachine, according to claim 11, further comprising: pedestals, to which the vanes are mounted.
Claim 14
Dependent Claim
37 words
Turbomachine, according to claim 12, wherein: each vane has an overall chord length; each pedestal has a diameter; and the diameter of the pedestal is between 0.25 and 1.25 times the overall chord length of the vane.
Claim 15
Dependent Claim
13 words
Turbomachine, according to claim 1, wherein: the rogue vanes are arranged in sectors.
Claim 16
Dependent Claim
26 words
Turbomachine, according to claim 1, wherein: the rogue vanes are arranged in sectors; and the sectors are arranged to balance forces imposed by the vane set.
Claim 17
Dependent Claim
17 words
Turbomachine, according to claim 1, wherein: the rogue vanes are permanently fixed at a design point position.
Claim 18
Dependent Claim
11 words
Turbomachine, according to claim 16, wherein: the normal vanes are free-floating.
Claim 19
Dependent Claim
18 words
Turbomachine, according to claim 1, wherein: all normal vanes are free-floating; and the rogue vanes are partially free-floating.
Claim 20
Dependent Claim
18 words
Turbomachine, according to claim 1, further comprising: means for scheduling the rogue vanes to a design point position.
Claim 21
Dependent Claim
11 words
Turbomachine, according to claim 19, wherein: the normal vanes are scheduled.
Claim 22
Dependent Claim
11 words
Turbomachine, according to claim 1, wherein: the normal vanes are free-floating.
Claim 23
Dependent Claim
11 words
Turbomachine, according to claim 1, wherein: the normal vanes are scheduled.
Claim 24
Dependent Claim
52 words
Turbomachine, according to claim 1, further comprising: a third portion of the vanes being intermediate vanes; wherein: for the given flow through the vane set, the angle of incidence of the intermediate vanes is between the angle of incidence of the rogue vanes and the angle of incidence of the normal vanes.
Claim 25
Dependent Claim
18 words
Turbomachine, according to claim 1, wherein: the vane set is a diffuser, and is disposed in a volute.
Claim 26
Dependent Claim
21 words
Turbomachine, according to claim 24, wherein: the rogue vanes are located in proximity to the volute and distant from a cutwater.
Claim 27
Dependent Claim
18 words
Turbomachine, according to claim 24, wherein: the rogue vanes are positioned away from a cutwater of the turbomachine.
Claim 28
Dependent Claim
11 words
Turbomachine, according to claim 24, wherein: the turbomachine is a pump.
Claim 29
Dependent Claim
11 words
Turbomachine, according to claim 24, wherein: the turbomachine is a compressor.
Claim 30
Dependent Claim
49 words
Turbomachine, according to claim 1, wherein: all of the vanes are set in an open position at high flow rates; the normal vanes are set to a more closed position at low flow rates; and the rogue vanes are left in an open position at the low flow rates.
Claim 31
Dependent Claim
19 words
Turbomachine, according to claim 1, wherein: the turbomachine is an axial compressor, including single stage and multi-stage axial compressors.
Claim 32
Dependent Claim
12 words
Turbomachine, according to claim 1, wherein: the turbomachine is a hydraulic pump-turbine.
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| 3.5 Years (Year 4) | 2001-03-23 | 2001-09-22 | 2002-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-23 | 2005-09-22 | 2006-03-24 | $3760.00 | Window Closed / Lapsed |
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