Inlet Distortion, Vorticity, and Stall in an Axial-flow Compressor PDF Download
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Author: Clinton Jefferson Farmer
Publisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 278
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Book Description
Author: Clinton Jefferson Farmer
Publisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 278
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Book Description
Author: Ann Margaret Sullivan
Publisher:
ISBN:
Category : Compressors
Languages : en
Pages : 344
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Book Description
Author: James Edward Shoemaker
Publisher:
ISBN:
Category : Compressors
Languages : en
Pages : 89
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Book Description
Vorticity forms the basis for a new approach to the analysis of inlet distortion in axial flow fans and compressors. Farmer first formulated this approach and this paper represents a test of the usefulness of his theory. A summary of recent developments in the field along with a discussion of the effects of distortion on stall margin forms a background for this complex problem. A computer program calculates the vorticity pattern at the compressor face using data that are read from a magnetic tape. The data, which were provided by NASA Lewis Research Center in Cleveland, consist of eleven stall events. The output of the program contains tables of stagnation pressure and the partial derivatives of pressure and the partial derivatives of pressure in the R and theta directions as well as three maps. The three maps are of pressure and radial and circumferential vorticity. The results of the program show a correlation between a ring of large positive circumferential vorticity and stall, leading to the conclusion that the stall was caused by the increase in blade loading induced by the vorticity. This conclusion suggests a formulation for a universal inlet distortion index and provides a basis for the evaluation of the vorticity approach to the problem. (Author).
Author: Jean Colpin
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 46
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Book Description
Author: James Edward Shoemaker
Publisher:
ISBN:
Category : Compressors
Languages : en
Pages : 0
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Book Description
Vorticity forms the basis for a new approach to the analysis of inlet distortion in axial flow fans and compressors. Farmer first formulated this approach and this paper represents a test of the usefulness of his theory. A summary of recent developments in the field along with a discussion of the effects of distortion on stall margin forms a background for this complex problem. A computer program calculates the vorticity pattern at the compressor face using data that are read from a magnetic tape. The data, which were provided by NASA Lewis Research Center in Cleveland, consist of eleven stall events. The output of the program contains tables of stagnation pressure and the partial derivatives of pressure and the partial derivatives of pressure in the R and theta directions as well as three maps. The three maps are of pressure and radial and circumferential vorticity. The results of the program show a correlation between a ring of large positive circumferential vorticity and stall, leading to the conclusion that the stall was caused by the increase in blade loading induced by the vorticity. This conclusion suggests a formulation for a universal inlet distortion index and provides a basis for the evaluation of the vorticity approach to the problem. (Author).
Author: Eddie Y.K. Ng
Publisher: Springer Science & Business Media
ISBN: 3540724125
Category : Technology & Engineering
Languages : en
Pages : 154
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Book Description
This book brings together the quick integral approaches and advances in the field for the prediction of stall and surge problems in the compressor. The book is useful for people involved in the flow analysis, design and testing of rotating machinery. For students, it can be used as a specialized topic of senior undergraduate or graduate study. The book can also serve as self-study material.
Author: Michael Martin Iverson
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 92
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Book Description
A survey of the literature on pressure, temperature and foreign gas inlet distortions is made. For interpretation of the influence of inlet distortion on engine stability, a break is made with distortion methods which use temperature or pressure distortion maps. The distortion in the form of temperature contours is transformed to vorticity using appropriate equations derived for both incompressible and compressible flow. A numerical solution of Poisson's equation to describe secondary flow arising from convected vorticity is presented. (Author).
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 194
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Book Description
Author: William H. Gauden
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 238
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Book Description
Author: Robert O. Bullock
Publisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 552
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Book Description
