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Design and Test of an Aspirated Counter-Rotating Fan.

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Title: Design and Test of an Aspirated Counter-Rotating Fan.
Authors: Kerrebrock, Jack L.1, Epstein, Alan H.1, Merchant, Ali A.1, Guenette, Gerald R.1, Parker, David1, Onnee, Jean-Francois1, Neumayer, Fritz1, Adamczyk, John J.2, Shabbir, Aamir3
Source: Journal of Turbomachinery. Apr2008, Vol. 130 Issue 2, p1-8. 8p. 4 Diagrams, 4 Charts, 9 Graphs.
Subjects: Fans (Machinery), Design, Rotational motion, Computational fluid dynamics, Fluid dynamics, Turbomachines
Abstract: The design and test of a two-stage, vaneless, aspirated counter-rotating fan is presented in this paper The fan nominal design objectives were a pressure ratio of 3:1 and adiabatic efficiency of 87%. A pressure ratio of 2.9 at 89% efficiency was measured at the design speed. The configuration consists of a counter-swirl-producing inlet guide vane, followed by a high tip speed (1450 ft/ s) nonaspirated rotor and a counter-rotating low speed (1150 ft/ s) aspirated rotor The lower tip speed and lower solidity of the second rotor result in a blade loading above conventional limits, but enable a balance between the shock loss and viscous boundary layer loss; the latter of which can be controlled by aspiration. The aspiration slot on the second rotor suction surface extends from the hub up to 80% span. The bleed flow is discharged inward through the blade hub. This fan was tested in a short duration blowdown facility. Particular attention was given to the design of the instrumentation to measure efficiency to 0.5% accuracy. High response static pressure measurements were taken between the rotors and downstream of the fan to determine the stall behavior Pressure ratio, mass flow, and efficiency on speed lines from 90% to 102% of the design speed are presented and discussed along with comparison to computational fluid dynamics predictions and design intent. The results presented here complement those presented earlier for two aspirated fan stages with tip shrouds, extending the validated design space for aspirated compressors to include designs with conventional unshrouded rotors and with inward removal of the aspirated flow. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Turbomachinery is the property of American Society of Mechanical Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
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Header DbId: egs
DbLabel: Engineering Source
An: 32003650
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Design and Test of an Aspirated Counter-Rotating Fan.
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  Data: <searchLink fieldCode="AR" term="%22Kerrebrock%2C+Jack+L%2E%22">Kerrebrock, Jack L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Epstein%2C+Alan+H%2E%22">Epstein, Alan H.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Merchant%2C+Ali+A%2E%22">Merchant, Ali A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Guenette%2C+Gerald+R%2E%22">Guenette, Gerald R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Parker%2C+David%22">Parker, David</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Onnee%2C+Jean-Francois%22">Onnee, Jean-Francois</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Neumayer%2C+Fritz%22">Neumayer, Fritz</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Adamczyk%2C+John+J%2E%22">Adamczyk, John J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Shabbir%2C+Aamir%22">Shabbir, Aamir</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Turbomachinery%22">Journal of Turbomachinery</searchLink>. Apr2008, Vol. 130 Issue 2, p1-8. 8p. 4 Diagrams, 4 Charts, 9 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Fans+%28Machinery%29%22">Fans (Machinery)</searchLink><br /><searchLink fieldCode="DE" term="%22Design%22">Design</searchLink><br /><searchLink fieldCode="DE" term="%22Rotational+motion%22">Rotational motion</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Turbomachines%22">Turbomachines</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The design and test of a two-stage, vaneless, aspirated counter-rotating fan is presented in this paper The fan nominal design objectives were a pressure ratio of 3:1 and adiabatic efficiency of 87%. A pressure ratio of 2.9 at 89% efficiency was measured at the design speed. The configuration consists of a counter-swirl-producing inlet guide vane, followed by a high tip speed (1450 ft/ s) nonaspirated rotor and a counter-rotating low speed (1150 ft/ s) aspirated rotor The lower tip speed and lower solidity of the second rotor result in a blade loading above conventional limits, but enable a balance between the shock loss and viscous boundary layer loss; the latter of which can be controlled by aspiration. The aspiration slot on the second rotor suction surface extends from the hub up to 80% span. The bleed flow is discharged inward through the blade hub. This fan was tested in a short duration blowdown facility. Particular attention was given to the design of the instrumentation to measure efficiency to 0.5% accuracy. High response static pressure measurements were taken between the rotors and downstream of the fan to determine the stall behavior Pressure ratio, mass flow, and efficiency on speed lines from 90% to 102% of the design speed are presented and discussed along with comparison to computational fluid dynamics predictions and design intent. The results presented here complement those presented earlier for two aspirated fan stages with tip shrouds, extending the validated design space for aspirated compressors to include designs with conventional unshrouded rotors and with inward removal of the aspirated flow. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Turbomachinery is the property of American Society of Mechanical Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=32003650
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        Value: 10.1115/1.2776951
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
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      – SubjectFull: Fans (Machinery)
        Type: general
      – SubjectFull: Design
        Type: general
      – SubjectFull: Rotational motion
        Type: general
      – SubjectFull: Computational fluid dynamics
        Type: general
      – SubjectFull: Fluid dynamics
        Type: general
      – SubjectFull: Turbomachines
        Type: general
    Titles:
      – TitleFull: Design and Test of an Aspirated Counter-Rotating Fan.
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            NameFull: Epstein, Alan H.
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              M: 04
              Text: Apr2008
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              Y: 2008
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