Author: A. Karl OwenPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Modeling the Dynamic Behavior of an Axial-centrifugal Compression System
Author: A. Karl OwenApplications of Axial and Radial Compressor Dynamic System Modeling
Author: Zoltán Sándor SpakovszkyPublisher:
ISBN:
Category :
Languages : en
Pages : 262
Book Description
(Cont.) The third project is the investigation of unsteady impeller-diffuser interaction effects on compressor stability. First, the unsteady blade-row interaction in axial compressors is analyzed using Model II. The results reveal a new signature of pre-stall waves that travel backward, altering the system dynamics when rotor and stator are moderately coupled. The physical mechanism for this behavior is explained from first principles and a coupling criterion is presented. The theory is then applied to centrifugal compressors and in particular to the NASA CC3 high-speed centrifugal compressor, in which experiments are conducted to verify the model predictions. The measurements show the predicted behavior and confirm the existence of backward traveling stall pre-cursors. The fourth project is an experimental demonstration of stability enhancement in the NASA CC3 high-speed centrifugal compressor with air injection. Based ...
Dynamic Modeling of Starting Aerodynamics and Stage Matching in an Axi-Centrifugal Compressor
Author: Kevin WilkesPublisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
Presented at the International Gas Turbine and Aeroengine Congress & Exhibition Birmingham, UK - June 10-13, 1996.
Dynamic Control of Centrifugal Compressor Surge Using Tailored Structures
Author: Daniel L. GyslingPublisher:
ISBN:
Category : Centrifugal compressors
Languages : en
Pages : 0
Book Description
A new method for dynamic control of centrifugal compressor surge is presented. The approach taken is to suppress surge by modifying the compression system dynamic behavior using structural feedback. More specifically, one wall of a downstream volume, or plenum, is constructed so as to move in response to small perturbations in pressure. This structural motion provides a means for absorbing the unsteady energy perturbations produced by the compressor, thus extending the stable operating range of the compression system. In the paper, a lumped parameter analysis is carried out to define the coupled aerodynamic and structural system behavior and the potential for stabilization. First-of-a-kind experiments are then conducted to examine the conclusions of the analysis. As predicted by the model and demonstrated by experiment, a movable plenum wall lowered the mass flow at which surge occurred in a centrifugal compression system by roughly 25 percent for a range of operating conditions. In addition, because the tailored dynamics of the structure acts to suppress instabilities in their initial stages, this control was achievable with relatively little power being dissipated by the movable wall system, and with no noticeable decrease in steady-state performance. Although designed on the basis of linear system considerations, the structural control is shown to be capable of suppressing existing large-amplitude limit cycle surge oscillations.
Design and Analysis of Centrifugal Compressors
Author: Rene Van den BraembusschePublisher: John Wiley & Sons
ISBN: 1119424100
Category : Technology & Engineering
Languages : en
Pages : 606
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.
Surge Dynamics and Unsteady Flow Phenomena in Centrifugal Compressors
Author: Massachusetts Institute of Technology. Gas Turbine LaboratoryPublisher:
ISBN:
Category :
Languages : en
Pages : 263
Book Description
ASME Technical Papers
Author: Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 444
Book Description
30th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Author: System Identification and Modeling of the Dynamics of a One Stage Axial Flow Compressor System
Author: Dane Michael SterbentzPublisher:
ISBN:
Category :
Languages : en
Pages : 134
Book Description
Author: D.-C. Liauw