Analytical And Experimental Investigation Of Rotating Stall Phenomena In Turbine Engine Compressors
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Analytical And Experimental Investigation Of Rotating Stall Phenomena In Turbine Engine Compressors
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Author :
language : en
Publisher:
Release Date : 1967
Analytical And Experimental Investigation Of Rotating Stall Phenomena In Turbine Engine Compressors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Compressors categories.
Analytical And Experimental Investigation Of Rotating Stall Phenomena In Turbine Engine Compressors
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Author : W. Gordon Brady
language : en
Publisher:
Release Date : 1967
Analytical And Experimental Investigation Of Rotating Stall Phenomena In Turbine Engine Compressors written by W. Gordon Brady and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
A research program to investigate fundamental mechanisms of rotating stall in axial-flow turbojet engine compressors is described. Analysis of the lift hysteresis of an oscillating elliptic airfoil at stall indicates that including the effects of a moving separation point on the criterion for separation of the boundary layer has a negligible effect on the computed lift hysteresis. Attempts were made to modify a previously developed rotating small-disturbance stability theory based on an actuator representation of blade rows so as to improve theoretical predictions of rotating stall. These attempts included modifications of blade-row representation, inclusion of viscous dissipation effects in the flow away from blade rows, and extension of the stability theory to include three-dimensional unsteady flows. The only modification of the stability theory which appeared to improve theoretical prediction of flow instability and for which numerical results were obtained was the assumption of actuators of finite thickness incorporated in the analysis of a configuration with a rotor plus a row of upstream guide vanes. It is concluded that more research is required before a final assessment of the validity of the rotating small-disturbance stability theory can be made. An annular cascade was designed and fabricated. The preliminary rotating-stall data obtained from the cascade are presented and discussed.
Technical Abstract Bulletin
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Author :
language : en
Publisher:
Release Date :
Technical Abstract Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Science categories.
Critical Points And Streamlines In Viscous Flows
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Author : Demetri P. Telionis
language : en
Publisher:
Release Date : 1976
Critical Points And Streamlines In Viscous Flows written by Demetri P. Telionis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
In two dimensional flows, stagnation points may appear away from solid boundaries. Numerical, analytical and experimental evidence is provided to support the existence of such critical points. The streamline pattern in the neighborhood of critical points is investigated. An intimate relationship between stagnation and separation points is discovered. (Author).
Nbs Special Publication
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Author :
language : en
Publisher:
Release Date : 1957
Nbs Special Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with Weights and measures categories.
Unsteady Flow In Turbomachines
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Author :
language : en
Publisher:
Release Date : 1979
Unsteady Flow In Turbomachines written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Turbomachines categories.
Compressor Surge And Stall
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Author : R. C. Pampreen
language : en
Publisher:
Release Date : 1993
Compressor Surge And Stall written by R. C. Pampreen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Technology & Engineering categories.
High efficiency axial and centrifugal compressors are important in fields as diverse as aircraft engines, superchargers and turbochargers, process and refrigeration compressors. Compressors must achieve high efficiency in blade rows in diffusing flow fields. Of equal and sometimes greater importance is the range os stable operation of the compressor. Blade row stall characteristics determine the limit os stable operation. Blading can stall uniformly with symmetric flow breakdown or asymmetrically in rotating stall, wich propagates around the periphery of the blade row. Depending on aerodynamic conditions, surge may occur instead of, in concert with, or subsequent to blade row stall. The transient breakdown and recovery of aerodynamic loading not only limits compressor performance but also leads to mechanical failures caused by the vibrational loads imposed on the blades. There is no need to know what initiates these performance limits so that surge and stall margins can be optimized and control strategies can be planned. the first step toward understanding is to be knowledgeable about he physical processes occurring during surge and stall. This will permit the designer to anticipate variable geometry needs such as variable inlet guide vanes, variable statuors, and bleed port strategies. Theoritical treatment is far from being well established, however, there are many approaches discussed in the literature. This book is a unique reference to the subject matter. Physical descriptions of the phenomena are given, test results are presented, and analytical studies are discussed. There has been much written about the experimental investigations and theoretical treatments related to surge and stall. To assist those who would pursue advancements in furthering ou knowledge of surge and stall, it seemed appropriate to have a resource that contains a compendium of information on this subject. That is the purpose of this book. [Source : d'après la 4e de couverture].
Nasa Sp
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Author :
language : en
Publisher:
Release Date : 1992
Nasa Sp written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Report
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1957
Report written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with Hydraulic engineering categories.
Masters Theses In The Pure And Applied Sciences
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Author : Wade H. Shafer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Masters Theses In The Pure And Applied Sciences written by Wade H. Shafer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.