Improvement of the Parallel Compressor Model by Consideration of Unsteady Blade Aerodynamics PDF Download
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Author: M. Lecht
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
The parallel compressor model was applied to predict compressor performance with circumferential total inlet distortion. In comparison with the experiment, however, this model gives too pessimistic results for the predicted stall line shift considering sector angles of distortion up to 120 degree. Detailed experimental evaluation of a compressor stage leads to unsteady performance effects obviously being responsible for this discrepancy. To improve the original model, the performance characteristic of the compressor was extended to account for a short time overload capability analogous to an airfoil in an unsteady flow. The governing factor of this modification will be the time-to-stall versus the time for a blade channel to pass the distorted sector. The model improvement has been demonstrated for a DFVLR and a NASA single stage transonic compressor subjected to a screen induced total pressure distortion.
Author: M. Lecht
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
The parallel compressor model was applied to predict compressor performance with circumferential total inlet distortion. In comparison with the experiment, however, this model gives too pessimistic results for the predicted stall line shift considering sector angles of distortion up to 120 degree. Detailed experimental evaluation of a compressor stage leads to unsteady performance effects obviously being responsible for this discrepancy. To improve the original model, the performance characteristic of the compressor was extended to account for a short time overload capability analogous to an airfoil in an unsteady flow. The governing factor of this modification will be the time-to-stall versus the time for a blade channel to pass the distorted sector. The model improvement has been demonstrated for a DFVLR and a NASA single stage transonic compressor subjected to a screen induced total pressure distortion.
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Category : Aeronautics
Languages : en
Pages : 704
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Category : Science
Languages : en
Pages : 520
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Author:
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Category : Airplanes
Languages : en
Pages : 320
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Book Description
Author:
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ISBN:
Category : Mechanical engineering
Languages : en
Pages : 566
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Book Description
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 654
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Book Description
Author:
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Category : Mechanical engineering
Languages : en
Pages : 562
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Author:
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Category : Aeronautics
Languages : en
Pages : 580
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Book Description
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Author:
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Category :
Languages : en
Pages : 566
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Book Description
Author: Kenneth C. Hall
Publisher: Springer Science & Business Media
ISBN: 9781402042676
Category : Technology & Engineering
Languages : en
Pages : 648
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Book Description
This textbook is a collection of technical papers that were presented at the 10th International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines held September 8-11, 2003 at Duke University in Durham, North Carolina. The papers represent the latest in state of the art research in the areas of aeroacoustics, aerothermodynamics, computational methods, experimental testing related to flow instabilities, flutter, forced response, multistage, and rotor-stator effects for turbomachinery.
