Download or read book Tracking and Control of Gas Turbine Engine Component Damage Life written by Link C. Jaw and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes damage mechanisms and the methods of controlling damages to extend the on-wing life of critical gas turbine engine components. Particularly, two types of damage mechanisms are discussed: creep/rupture and thermo-mechanical fatigue. To control these damages and extend the life of engine hot-section components, we have investigated two methodologies to be implemented as additional control logic for the on-board electronic control unit. This new logic, the life-extending control (LEC), interacts with the engine control and monitoring unit and modifies the fuel flow to reduce component damages in a flight mission. The LEC methodologies were demonstrated in a real-time, hardware-in-the-loop simulation. The results show that LEC is not only a new paradigm for engine control design, but also a promising technology for extending the service life of engine components, hence reducing the life cycle cost of the engine.
Download or read book Guide to Life Usage Monitoring and Parts Management for Aircraft Gas Turbine Engines written by E-32 Aerospace Propulsion Systems Health Management and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effectiveness of Engine Life Usage Monitoring and PartsManagement systems is largely determined by the aircraft-specificrequirements. This document addresses the following areas: safety,life-limiting criteria, life usage algorithm development, dataacquisition and management, parts life tracking, design feedback,and cost effectiveness.It primarily examines the requirements and techniques currentlyin use, and considers the potential impact of new technolog to thefollowing areas: parts classification and control requirements,failure causes of life-limited parts, engine life prediction andusage measurement techniques, method validation, parts life usagedata management, lessons learned, and life usage trackingbenefits.SAE ARP1587 provides general guidance on the designconsideration and objectives of monitoring systems for aircraft gasturbine engines. A major function of these Engine MonitoringSystems is to monitor the usage of life-limited parts in order tomaximize available life and to enhance aircraft safety.The purpose of this document is to review the current approachesto Engine Life Usage Monitoring and Parts Management. The documentalso serves to provide a summary of the many varied requirements ofaircraft turbine engine life usage monitoring and parts managementand a description of the means by which these requirements can beachieved more effectively through the use of engine monitoringsystems.This document is being cancelled because there has been no progress since 2003 and the committee has no one to lead a WG to update it. Engine OEMs and Certification Authorities are concerned it could be used to develop a new system against that would no longer meet current standards.
Download or read book Guide to Life Usage Monitoring and Parts Management for Aircraft Gas Turbine Engines written by and published by . This book was released on 1988 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Incorporating Residual Stresses in Life Prediction of Turbine Engine Disks written by Reji John and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Air Force has initiated a technology development initiative known as Engine Rotor Life Extension (ERLE), which has the goal of extending the useful lifetime of major, fracture-critical components in currently fielded gas turbine engines, without increasing the risk of component failure. Full achievement of this goal will require improvements in a broad range of technologies, including life prediction and fracture mechanics, nondestructive evaluation, engine usage and health monitoring, and component repair. This paper focuses on a key aspect of the life prediction process - the incorporation of residual stress effects. The benefits of compressive residual stresses in improving fatigue life, retardation of crack growth and resistance to foreign object damage have been demonstrated. Hence, the%se beneficial surface treatments are extensively employed in the turbine engine components. However, current damage-tolerance-based life management practices do not explicitly account for the residual stresses induced by surface enhancement procedures. Significant increase in predicted damage tolerance can be obtained if residual stresses are included in the life prediction methodology. This paper provides an assessment of the role of residual stresses in the durability of the component and identifies critical issues to be addressed during implementation in life prediction methods.
Download or read book Gas Turbine Diagnostics written by Ranjan Ganguli and published by CRC Press. This book was released on 2012-12-13 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Widely used for power generation, gas turbine engines are susceptible to faults due to the harsh working environment. Most engine problems are preceded by a sharp change in measurement deviations compared to a baseline engine, but the trend data of these deviations over time are contaminated with noise and non-Gaussian outliers. Gas Turbine Diagnostics: Signal Processing and Fault Isolation presents signal processing algorithms to improve fault diagnosis in gas turbine engines, particularly jet engines. The algorithms focus on removing noise and outliers while keeping the key signal features that may indicate a fault. The book brings together recent methods in data filtering, trend shift detection, and fault isolation, including several novel approaches proposed by the author. Each method is demonstrated through numerical simulations that can be easily performed by the reader. Coverage includes: Filters for gas turbines with slow data availability Hybrid filters for engines equipped with faster data monitoring systems Nonlinear myriad filters for cases where monitoring of transient data can lead to better fault detection Innovative nonlinear filters for data cleaning developed using optimization methods An edge detector based on gradient and Laplacian calculations A process of automating fault isolation using a bank of Kalman filters, fuzzy logic systems, neural networks, and genetic fuzzy systems when an engine model is available An example of vibration-based diagnostics for turbine blades to complement the performance-based methods Using simple examples, the book describes new research tools to more effectively isolate faults in gas turbine engines. These algorithms may also be useful for condition and health monitoring in other systems where sharp changes in measurement data indicate the onset of a fault.
Download or read book A Software Framework for Probabilistic Fatigue Life Assessment of Gas Turbine Engine Rotors written by HR. Millwater and published by . This book was released on 2004 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: An enhanced life management process based on probabilistic damage tolerance methods has been developed to address material anomalies in titanium rotating components of gas turbine engines. Related methods are being used as tools to investigate the impact of engine monitoring and usage variability on prognosis for field readiness and life management. This paper begins with an overview of the process of probabilistic damage tolerant design, using the DARWIN® computer program to illustrate the interplay between various random variables and the conventional elements of structural design and life prediction. Special attention is then given to the initial distribution of material anomalies, scatter in fatigue crack growth data, and variability in complex mission histories. The significance of each source of variability for different applications is discussed.
Download or read book Materials and Strength of Gas Turbine Parts written by Leonid Borisovich Getsov and published by Springer Nature. This book was released on 2021-04-17 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses several mechanical and material problems that are typical for gas turbine components. It discusses accelerated tests and other methods for increasing the reliability of gas turbine engines. Special attention is given to non-traditional methods for calculating the strength characteristics and longevity of the main components. This first volume focuses on the selection of materials, deformation and destruction mechanisms in connection with stationary and non-stationary loading, and types of material damage such as the thermal fatigue. Particular attention is paid to the issues of the properties of single crystal alloys, the relationship between structure and properties, the influence of technological factors and long-term operation. The characteristics of creep resistance, crack resistance, and resistance to cyclic deformation of different alloys are given.
Download or read book Structural Integrity and Damage Tolerant Life Prediction of Ti 6 4 Gas Turbine Engine Components Using Finite Element Analysis written by Imad S. Salha and published by . This book was released on 1995 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aircraft Turbine Engine Monitoring Systems written by J. L. Birkler and published by . This book was released on 1979 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life Assessment of Hot Section Gas Turbine Components written by R. D. Townsend and published by CRC Press. This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a Conference Held at Heriot Watt University, Edinburgh, 5-7 October 1999.Contents include: Design and Life Management; Cracks and Lifing; Continuum Damage; Coatings; Low Ductility Materials; Remaining Life Assessment; Repair Technology.
Download or read book Protective Coatings for Turbine Blades written by Y. Tamarin and published by ASM International. This book was released on 2002 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the problem of surface protection for aircraft engine turbine blades. It is based on the author's 30+ years of work on the development and application of coatings to protect against oxidation and hot corrosion. It describes and details a methodology for optimizing turbine blade surface protection. The distinctions of this book from other publications on this topic include: The performance of protective coatings is assessed and evaluated by the complex interconnections of their chemical and phase composition, structure, and physical-mechanical properties; The properties of overlay coatings are given for the wide range of compositions, including the possible coatings states after their production and long-term service; The principles for calculating the stresses and strains for coated turbine blades are reviewed.
Download or read book AMT A P Certification Test Preparation Combined General Airframe and Powerplant written by James Gim and published by James Gim. This book was released on 2023-12-01 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: AMT A&P Certification Test Preparation Combined General, Airframe and Powerplant" is the ultimate resource for individuals pursuing their Airframe and Powerplant (A&P) certification from the Federal Aviation Administration (FAA). This comprehensive book brings together all the essential knowledge required for the General, Airframe, and Powerplant portions of the A&P certification exams. Inside this comprehensive guide, you'll find: Extensive Coverage: This book covers all three major sections of the A&P certification exams—General, Airframe, and Powerplant—with in-depth and detailed explanations of essential aviation topics. From aviation regulations to aircraft systems, airframes, engines, and maintenance procedures, every aspect of the A&P certification is thoroughly addressed. Practice Questions: Test your understanding and knowledge with a vast selection of practice questions and answers that mirror the format and content of the actual FAA exams. These practice questions help reinforce your learning and prepare you for success. Detailed Explanations: Complex aviation concepts and technical information are presented in a clear and accessible manner, making it easier for readers to grasp the intricacies of aircraft maintenance and repair. Test-Taking Strategies: Gain valuable insights into effective test-taking strategies and tips that can help you approach the A&P certification exams with confidence. Maximize your chances of passing on your first attempt. Whether you are a novice aviation enthusiast seeking a career as an aviation maintenance technician or a seasoned professional looking to validate your skills and knowledge, "AMT A&P Certification Test Preparation Combined General, Airframe and Powerplant" is the go-to resource to ensure your success in obtaining the A&P certification. This book provides a comprehensive and structured approach to mastering the knowledge and skills required for a rewarding career in aircraft maintenance. In addition, we continuously upload video lectures on YouTube to make it even easier for you to comprehend complex topics and prepare effectively for your certification.
Download or read book The Theory of Diffusion in Strained Systems written by Louis A. Girifalco and published by . This book was released on 1959 with total page 1082 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general theory of solid-state diffusion in strained systems is developed on a molecular-kinetic basis. The theory predicts that for simple strains the diffusion coefficient is an exponential function of the lattice parameter and that the rate of change of the diffusion coefficient with strain is linearly related to the interatomic forces. It has also been shown that for plastic flow the diffusion coefficient is a linear function of strain rate. All the conclusions are confirmed by the data available in the literature.
Download or read book NASA Technical Report written by United States. National Aeronautics and Space Administration and published by . This book was released on 1959 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Download or read book Integrated Vehicle Health Management written by Ian K Jennions and published by SAE International. This book was released on 2013-09-25 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated Vehicle Health Management (IVHM) is a relatively new subject, with its roots back in the space sector of the early 1990s. Although many of the papers written around that time did not refer to it as IVHM, the fundamental principles of considering an integrated end-to-end system to monitor the overall health of the asset were clearly visible. As the subject of Integrated Vehicle Health Management (IVHM) and its associated technologies have grown up, businesses are making the transformation from selling a product to selling a service. This can be viewed as a positive disruption, as a relatively small technology breakthrough is being brought to market for a large business benefit. The sequence “sense—acquire—transfer—analyze—act “ feeds the information (processed data) on the asset’s health into the Operations or Management control center. Here, decisions can be made on maintenance actions with knowledge of the supply chain status, MRO loading, etc., provided by Maintenance and Logistics systems. Undoubtedly, a much more efficient and economical modus operandi. This book brings together a collection of twenty –two SAE International Technical papers on this very theme, organized according to specific areas of interest: • Engines • Airframes • Electrical Power Systems • Supporting Systems • Architecture They were selected by Dr. Ian K. Jennions, Director of IVHM Center at Cranfield University, in the UK. Dr. Jennions was also the editor of three other books on Integrated Vehicle Health Management, published by SAE International: • IVHM: Perspectives on an Emerging Field • IVHM: Business Case Theory and Practice • IVHM: The Technology
