Author: John Michael SebghatiPublisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 192
Book Description
Monitoring Axial-flow Compressors for Rotating Stall and Surge
Author: John Michael SebghatiPublisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 192
Book Description
Model for Rotating Stall and Surge in Axial Flow Compressors
Author: A. GogoiCompressor Surge and Stall
Author: R. C. PampreenPublisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 532
Book Description
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].
Experimental study on monitoring and prediction of rotating stall in an axial-flow compressor
Author: Hiroshi KobayashiRotating Stall and Surge in Axial Flow Compressors
Author: Karen Anne TeerlinckPublisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 48
Book Description
Numerical Simulations of Surge and Rotating Stall in Multi-stage Axial-flow Compressors
Author: J. F. EscuretBifurcation Analysis of Surge and Rotating Stall in Axial Flow Compressors
Author: Eyad H. AbedPublisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 8
Book Description
These results are used to reconstruct Greitzer's (1976) findings regarding the manner in which post-instability behavior depends on system parameters. Moreover, the results provide significant new insight deemed valuable in the prediction, analysis and control of stall instabilities in gas turbine jet engines."
Compressor Surge and Rotating Stall
Author: Jan Tommy GravdahlPublisher: Springer Science & Business Media
ISBN: 1447108272
Category : Technology & Engineering
Languages : en
Pages : 233
Book Description
The series Advances in Industrial Control aims to report and encourage technology transfer in control engineering. The rapid development of control technology impacts all areas of the control discipline. New theory, new controllers, actuators, sensors, new industrial processes, computer methods, new applications, new philosophies . . . , new challenges. Much of this development work resides in industrial reports, feasibility study papers and the reports of advanced collaborative projects. The series offers an opportunity for researchers to present an extended exposition of such new work in all aspects of industrial control for wider and rapid dissemination. Operating plant as close as possible to constraint boundaries so often brings economic benefits in industrial process control. This is the conundrum at the heart of this monograph by Tommy Gravdahl and Olav Egeland on stall control for compressors. Operation of the compressor closer to the surge line can increase operational efficiency and flexibility The approach taken by the authors follows the modern control system paradigm: -physical understanding, detailed modelling and simulation studies and finally control studies. The thoroughness of the presentation, bibliography and appendices indicates that the volume has all the hallmarks of being a classic for its subject. Despite the monograph's narrow technical content, the techniques and insights presented should appeal to the wider industrial control community as well as the gas turbine/compressor specialist. M. J. Grimble and M. A.
Time Resolved Measurements of Rotating Stall in Axial Flow Compressors
Author: Philip L. LavrichDetection of a Rotating Stall Precursor in Isolated Axial Flow Compressor Rotors
Author: Masahiro InouePublisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 0
Book Description
Statistical characteristics of pressure fluctuation on the casing wall of two axial flow compressor rotors have been investigated experimentally to find a precursor of rotating stall. Near stall, the casing wall pressure across a flow passage near the leading edge is characterized by a highly unsteady region where low-momentum fluid accumulates. The periodicity of the pressure fluctuation with blade spacing disappears and an alternative phenomenon comes into existence, which supports the disturbance propagating at a different speed from the rotor revolution. The precursor of rotating stall can be detected by monitoring collapse of the periodicity in the pressure fluctuation. To represent the periodicity qualitatively, a practical detection parameter has been proposed, which is easily obtained from signals of a single pressure sensor installed at an appropriate position on the casing wall during operation of a compressor.