A Wide-Range Axial-Flow Compressor Stage Performance Model PDF Download
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Author: Gregory S. Bloch Publisher: ISBN: Category : Axial flow compressors Languages : en Pages : 81
Book Description
Dynamic compression system response is a major concern in the operability of aircraft gas turbine engines and computer models have been developed to predict compressor response to changing operating conditions. These models require a knowledge of the steady-stage operating characteristics as inputs, which limits the ability to use them as predicting tools. The full range of dynamic axial flow compressor operation spans forward and reversed flow conditions. A model for predicting the wide flow range characteristics of axial flow compressor stages has been developed and a parametric study of the effect of changing design variables on steady-state performance has been conducted. The model was applied to a 3-stage, low-speed compressor with very favorable results and to a 10-stage, high-speed compressor with mixed results. Conclusions were made regarding the inception of stalling and the effects associated with operating a stage in a multistage environment. It was also conclude that there are operating points of an isolated compressor stage that are not attainable when that stage is operated in a multistage environment. Axial Compressor, Stalling Performance, Aircraft Turbine, Engine, Performance Prediction.
Author: Gregory S. Bloch Publisher: ISBN: Category : Axial flow compressors Languages : en Pages : 81
Book Description
Dynamic compression system response is a major concern in the operability of aircraft gas turbine engines and computer models have been developed to predict compressor response to changing operating conditions. These models require a knowledge of the steady-stage operating characteristics as inputs, which limits the ability to use them as predicting tools. The full range of dynamic axial flow compressor operation spans forward and reversed flow conditions. A model for predicting the wide flow range characteristics of axial flow compressor stages has been developed and a parametric study of the effect of changing design variables on steady-state performance has been conducted. The model was applied to a 3-stage, low-speed compressor with very favorable results and to a 10-stage, high-speed compressor with mixed results. Conclusions were made regarding the inception of stalling and the effects associated with operating a stage in a multistage environment. It was also conclude that there are operating points of an isolated compressor stage that are not attainable when that stage is operated in a multistage environment. Axial Compressor, Stalling Performance, Aircraft Turbine, Engine, Performance Prediction.
Author: Ronald H. Aungier Publisher: American Society of Mechanical Engineers ISBN: Category : Science Languages : en Pages : 386
Book Description
This book provides a thorough description of an aerodynamic design and analysis systems for Axial-Flow Compressors. It describes the basic fluid dynamic and thermodynamic principles, empirical models and numerical methods used for the full range of procedures and analytical tools that an engineer needs for virtually any tupe of Axial-Flow Compressor, aerodynamic design or analysis activity. It reviews and evaluates several design strategies that have been recommended in the literature or which have been found to be effective. It gives a complete description of an actual working system, such that readers can implement all or part of the system. Engineers responsible for developing, maintaining of improving design and analysis systems can benefit greatly from this type of reference. The technology has become so complex and the role of computers so pervasive that about the only way this can be done today is to concentrate on a specific design and analysis system. The author provides practical methodology as well as the details needed to implement the suggested procedures.
Author: Willard R. Westphal Publisher: ISBN: Category : Axial flow compressors Languages : en Pages : 66
Book Description
A six-stage axial-flow compressor with a tip speed of 550 feet per second and a flat operating characteristics at constant speed has been designed and tested. It was designed for a constant power input per pound of flow in expectation that this would result in a wider mass-flow operating range at a given stagnation-presssure ratio. The design specific weight flow was 21.3 pounds per second per square foot of frontal area at atmospheric discharge with a stagnation-pressure ratio of 3.25 and an inlet hub-tip radius ratio of 0.7. Several configurations consisting of various blade setting angles and solidities were tested. Tests showed that the design flow, pressure ratio, and flat operating characteristic were obtained over a range of 10 percent of design flow at a peak efficiency of 82 percent for design conditions. The compressor had a possible immediate application for air removal from a large slotted-throat transonic wind tunnel, but the design theory could apply to any low-speed industrial compressor or second spool of a turbojet engine.
Author: John T. Sinnette Publisher: ISBN: Category : Aerofoils Languages : en Pages : 74
Book Description
The NACA has conducted an investigation to determine the performance that can be obtained from a multistage axial-flow compressor based on airfoil research. A theory was developed; an eight-stage axial-flow compressor was designed, constructed, and tested.
Author: Melvyn Savage Publisher: ISBN: Category : Axial flow compressors Languages : en Pages : 40
Book Description
Multistage compressors composed of high-pressure-ratio stages have higher over-all off-design efficiencies and a wider operating range than those made up of low-pressure-ratio stages if the blade-row efficiency curves for the two cases are assumed to be somewhat similar.
Author: A. B. McKenzie Publisher: Ashgate Publishing ISBN: Category : Science Languages : en Pages : 290
Book Description
Provides readers with an understanding of aerodynamic design and performance of fans and compressors. The book includes practical emphasis on design problems, experimental facilities and data analysis, together with some design examples and novel concepts.
Author: Gregory S. Bloch
Author: Gregory S. Bloch
Author: Ronald H. Aungier
Author: Willard R. Westphal
Author: Donald C. Urasek
Author: John T. Sinnette
Author: Melvyn Savage
Author: S. R. Saha
Author: John T. Sinnette (Jr.)
Author: Linwood C. Wright
Author: A. B. McKenzie