Author: Dane Michael SterbentzPublisher:
ISBN:
Category :
Languages : en
Pages : 134
Book Description
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
System Identification of a Single Stage Axial Gas Turbine Compressor
Author: Chigozie Fredrick OkekePublisher:
ISBN:
Category :
Languages : en
Pages : 136
Book Description
The instability of compression systems of turbo machinery limits its efficiency and capability. Various phenomena have been attributed to this instability which most times lead to serious consequences such as damage of the system or even disaster. A lot of literature and research has been proposed on how to predict and control these instabilities with stall and surge being the most studied. The bases of most research are derived from the work of Moore-Greitzer where the propagation of these instabilities is predicted with non-linear differential equations. This approach has had a lot of inaccuracies and has been more expensive to carry out. In this thesis, I propose a new way of looking at the instabilities of stall and surge by analyzing the interactions of the components of the compressor with signal analysis. By using system identification to obtain the fluid flow dynamics at the blade tip of the turbine and the input and output characteristics, one can predict and control stall and surge conditions of any compressor.
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.
Axial-flow Compressors
Author: Ronald H. AungierPublisher: 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.
Modeling Compressor Dynamics Using System Identification
Author: Sujan PrasaiPerformance of Supersonic Axial-flow Compressors Based on One-dimensional Analysis
Author: Linwood C. WrightPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 34
Book Description
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.
Modeling of a Three Stage Axial-flow Compressor with Flow Corrections
Author: Brahmaji Rao KadiumPublisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 358
Book Description
A Wide-Range Axial-Flow Compressor Stage Performance Model
Author: Gregory S. BlochPublisher:
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.
Design and Tests of a Six-stage Axial-flow Compressor Having a Tip Speed of 550 Feet Per Second and a Flat Operating Characteristic at Constant Speed
Author: Willard R. WestphalPublisher:
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.