Experimental Investigation of the Stalled Flow in a Centrifugal Pump-turbine with Vaned Diffuser PDF Download
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Author: Marina Ubaldi
Publisher:
ISBN:
Category : Diffusers
Languages : en
Pages : 0
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Book Description
Detailed measurements have been made of the stalled flow in a centrifugal pump-turbine model operating in air. Instantaneous velocity, total pressure and flow angle have been measured with hot wire and pressure probes at the impeller inlet and outlet and in the vaned diffuser for several pump operating points, ranging from nominal to very low flow rates. Three distinct stall phenomena have been found to affect the pump operation at reduced flow rates. The unsteady characteristics of these unstable flows have been analysed both in time and in frequency domain by means of Fourier transforms of the velocity signals. The changes in the flow structure, correlated to the occurrence of the observed stall conditions, have been investigated by means of phase-locked ensemble averages of the instantaneous velocity components at the impeller outlet and surveys of the mean total pressure and absolute flow angle distributions within the diffuser passages.
Author: Marina Ubaldi
Publisher:
ISBN:
Category : Diffusers
Languages : en
Pages : 0
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Book Description
Detailed measurements have been made of the stalled flow in a centrifugal pump-turbine model operating in air. Instantaneous velocity, total pressure and flow angle have been measured with hot wire and pressure probes at the impeller inlet and outlet and in the vaned diffuser for several pump operating points, ranging from nominal to very low flow rates. Three distinct stall phenomena have been found to affect the pump operation at reduced flow rates. The unsteady characteristics of these unstable flows have been analysed both in time and in frequency domain by means of Fourier transforms of the velocity signals. The changes in the flow structure, correlated to the occurrence of the observed stall conditions, have been investigated by means of phase-locked ensemble averages of the instantaneous velocity components at the impeller outlet and surveys of the mean total pressure and absolute flow angle distributions within the diffuser passages.
Author: Johann Friedrich Gülich
Publisher: Springer Science & Business Media
ISBN: 3540736956
Category : Technology & Engineering
Languages : en
Pages : 957
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Book Description
This book offers up-to-date, unparalleled coverage of all kinds of flow phenomena encountered in centrifugal pumps. It also presents in-depth treatment of the underlying physical mechanisms for practical applications. Information on the methods and procedures for the various calculations and failure diagnostics discussed in the text are presented in a large variety of ready to use tables.
Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 498
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Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 504
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Author: N. Pedersen
Publisher:
ISBN: 9788774752394
Category :
Languages : en
Pages :
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Author: Jianzhong Xu
Publisher: Springer Science & Business Media
ISBN: 3540897496
Category : Technology & Engineering
Languages : en
Pages : 445
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Book Description
"Fluid Machinery and Fluid Mechanics: 4th International Symposium (4th ISFMFE)" is the proceedings of 4th International Symposium on Fluid Machinery and Fluid Engineering, held in Beijing November 24-27, 2008. It contains 69 highly informative technical papers presented at the Mei Lecture session and the technical sessions of the symposium. The Chinese Society of Engineering Thermophysics (CSET) organized the First, the Second and the Third International Symposium on Fluid Machinery and Fluid Engineering (1996, 2000 and 2004). The purpose of the 4th Symposium is to provide a common forum for exchange of scientific and technical information worldwide on fluid machinery and fluid engineering for scientists and engineers. The main subject of this symposium is "Fluid Machinery for Energy Conservation". The "Mei Lecture" reports on the most recent developments of fluid machinery in commemoration of the late professor Mei Zuyan. The book is intended for researchers and engineers in fluid machinery and fluid engineering. Jianzhong Xu is a professor at the Chinese Society of Engineering Thermophysics, Chinese Academy of Sciences, Beijing.
Author:
Publisher:
ISBN:
Category : Turbomachines
Languages : en
Pages : 800
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Author: Lee Charles Cadwallader
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
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Book Description
Author: Rene Van den Braembussche
Publisher: John Wiley & Sons
ISBN: 1119424097
Category : Technology & Engineering
Languages : en
Pages : 418
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Book Description
A comprehensive overview of fluid dynamic models and experimental results that can help solve problems in centrifugal compressors and modern techniques for a more efficient aerodynamic design. Design and Analysis of Centrifugal Compressors isacomprehensive overview of the theoretical fluid dynamic models describing the flow in centrifugal compressors and the modern techniques for the design of more efficient centrifugal compressors. The author — a noted expert in the field, with over 40 years of experience — evaluates relevant numerical and analytical prediction models for centrifugal compressors with special attention to their accuracy and limitations. Relevant knowledge from the last century is linked with new insights obtained from modern CFD. Emphasis is to link the flow structure, performance and stability to the geometry of the different compressor components. Design and Analysis of Centrifugal Compressors is an accessible resource that combines theory with experimental data and previous research with recent developments in computational design and optimization. This important resource Covers the basic information concerning fluid dynamics that are specific for centrifugal compressors and clarifies the differences with axial compressors Provides an overview of performance prediction models previously developed in combination with extra results from research conducted by the author Describes helpful numerical and analytical models for the flow in the different components in relation to flow stability, operating range and performance Includes the fundamental information for the aerodynamic design of more efficient centrifugal compressors Explains the use of computational fluid dynamics (CFD) for the design and analysis of centrifugal compressors Written for engineers, researchers and designers in industry as well as for academics specializing in the field, Design and Analysis of Centrifugal Compressors offers an up to date overview of the information needed for the design of more effective centrifugal compressors.
Author:
Publisher:
ISBN:
Category : Rotors
Languages : en
Pages : 680
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Book Description
