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Dimension Determination Of Precursive Stall Events In A Single Stage High Speed Compressor
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725675087 Total Pages :30 pages Book Rating :4.6/5 (75 download)
Book Synopsis Dimension Determination of Precursive Stall Events in a Single Stage High Speed Compressor by : National Aeronautics and Space Administration (NASA)
Download or read book Dimension Determination of Precursive Stall Events in a Single Stage High Speed Compressor written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-17 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a study of the dynamics for a single-stage, axial-flow, high speed compressor core, specifically, the NASA Lewis rotor stage 37. Due to the overall blading design for this advanced core compressor, each stage has considerable tip loading and higher speed than most compressor designs, thus, the compressor operates closer to the stall margin. The onset of rotating stall is explained as bifurcations in the dynamics of axial compressors. Data taken from the compressor during a rotating stall event is analyzed. Through the use of a box-assisted correlation dimension methodology, the attractor dimension is determined during the bifurcations leading to rotating stall. The intent of this study is to examine the behavior of precursive stall events so as to predict the entrance into rotating stall. This information may provide a better means to identify, avoid or control the undesirable event of rotating stall formation in high speed compressor cores. Bright, Michelle M. and Qammar, Helen K. and Hartley, Tom T. Unspecified Center NASA-TM-107268, E-10335, NAS 1.15:107268 RTOP 505-62-50...
Book Synopsis Dimension Determination of Precursive Stall Events in a Single Stage High Speed Compressor by : Michelle M. Bright
Download or read book Dimension Determination of Precursive Stall Events in a Single Stage High Speed Compressor written by Michelle M. Bright and published by . This book was released on 1996 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dimension Determination of Precursive Stall Events in a Single Stage High Speed Compressor by :
Download or read book Dimension Determination of Precursive Stall Events in a Single Stage High Speed Compressor written by and published by . This book was released on 1996 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1998-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit by :
Download or read book 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit written by and published by . This book was released on 1998 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sensing, Actuation, and Control in Aeropropulsion by : James Donald Paduano
Download or read book Sensing, Actuation, and Control in Aeropropulsion written by James Donald Paduano and published by . This book was released on 1995 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 1996 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper written by and published by . This book was released on 1996 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1997 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Stall Inception in High-Speed Single-Stage Compressors by :
Download or read book Characterization of Stall Inception in High-Speed Single-Stage Compressors written by and published by . This book was released on 1992 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two single-stage, transonic compressor designs were tested under various undistorted operating conditions to characterize the process leading up to aerodynamic stall. The rig case was instrumented with eight high-response static pressure transducers equally spaced around the annulus for stall development detection. High-response measurements were low-pass filtered and both spatially and temporally analyzed using discrete Fourier techniques. At all speeds tested for both designs, stall inception was characterized by growth of a small amplitude' rotating wave. The waves did not grow significantly until just prior to the instability, when exponential growth into fully-developed rotating stall occurred very rapidly, within 6-10 rotor revolutions. The amount of time the rotating waves could be detected prior to stall varied considerably with compressor operating condition and was largely dependent on the local slope of the compressor speedline characteristics. Stall warning times ranged from less than one-tenth of a second to more than two seconds for the same machine operated at different high speeds (above 60% design speed). The influence of compressibility effects are also discussed.
Download or read book Journal of Turbomachinery written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Countering Cyber Sabotage by : Andrew A. Bochman
Download or read book Countering Cyber Sabotage written by Andrew A. Bochman and published by CRC Press. This book was released on 2021-01-20 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Countering Cyber Sabotage: Introducing Consequence-Driven, Cyber-Informed Engineering (CCE) introduces a new methodology to help critical infrastructure owners, operators and their security practitioners make demonstrable improvements in securing their most important functions and processes. Current best practice approaches to cyber defense struggle to stop targeted attackers from creating potentially catastrophic results. From a national security perspective, it is not just the damage to the military, the economy, or essential critical infrastructure companies that is a concern. It is the cumulative, downstream effects from potential regional blackouts, military mission kills, transportation stoppages, water delivery or treatment issues, and so on. CCE is a validation that engineering first principles can be applied to the most important cybersecurity challenges and in so doing, protect organizations in ways current approaches do not. The most pressing threat is cyber-enabled sabotage, and CCE begins with the assumption that well-resourced, adaptive adversaries are already in and have been for some time, undetected and perhaps undetectable. Chapter 1 recaps the current and near-future states of digital technologies in critical infrastructure and the implications of our near-total dependence on them. Chapters 2 and 3 describe the origins of the methodology and set the stage for the more in-depth examination that follows. Chapter 4 describes how to prepare for an engagement, and chapters 5-8 address each of the four phases. The CCE phase chapters take the reader on a more granular walkthrough of the methodology with examples from the field, phase objectives, and the steps to take in each phase. Concluding chapter 9 covers training options and looks towards a future where these concepts are scaled more broadly.
Book Synopsis Handbook of Rotordynamics by : Fredric F. Ehrich
Download or read book Handbook of Rotordynamics written by Fredric F. Ehrich and published by Krieger Publishing Company. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented here is a comprehensive work on the general principles that apply to every type of modern rotating machinery. This handbook addresses both the theoretical and practical issues pertaining to the design, analysis, development, production, and maintenance of high-speed rotating machinery. It is the only work available that provides engineers with the information they need to anticipate, locate, and eliminate destructive vibration. This outstanding handbook contains chapters written by recognized experts in their respective fields, providing practical information on: vibration considerations in the design of rotating machinery; analytic prediction of rotordynamic response; balancing of flexible and rigid rotors; and performance verification, diagnostics, parameter identification, and vibration monitoring in rotating machinery. Covering the general principles that apply to every type of modern rotating machinery, the handbook is packed with specific examples about a wide array of equipment, including steam turbines, electrical motors, generators, aircraft gas turbines, reciprocating engines, and centrifuges. Fredric F. Ehrich, a registered professional engineer and a member of the National Academy of Engineering received his B.S., M.E., and Sc.D. degrees in Mechanical Engineering from M.I.T. He spent the majority of his career in the design and development of aircraft gas turbines at General Electric Aircraft Engines and earlier in the Aircraft Gas Turbine Division of the Westinghouse Co. Since his retirement, he has been active in research and teaching as a senior lecturer at M.I.T. and in consulting. Dr. Ehrich is the author of over 50 published technical papers on rotordynamics and related topics, and he holds nine issued patents on aircraft gas turbine apparatus.
Book Synopsis Noise Reduction in Speech Applications by : Gillian M. Davis
Download or read book Noise Reduction in Speech Applications written by Gillian M. Davis and published by CRC Press. This book was released on 2018-10-03 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noise and distortion that degrade the quality of speech signals can come from any number of sources. The technology and techniques for dealing with noise are almost as numerous, but it is only recently, with the development of inexpensive digital signal processing hardware, that the implementation of the technology has become practical. Noise Reduction in Speech Applications provides a comprehensive introduction to modern techniques for removing or reducing background noise from a range of speech-related applications. Self-contained, it starts with a tutorial-style chapter of background material, then focuses on system aspects, digital algorithms, and implementation. The final section explores a variety of applications and demonstrates to potential users of the technology the results possible with the noise reduction techniques presented. The book offers chapters contributed by international experts, a practical, systems approach, and numerous references. For electrical, acoustics, signal processing, communications, and bioengineers, Noise Reduction in Speech Applications is a valuable resource that shows you how to decide whether noise reduction will solve problems in your own systems and how to make the best use of the technologies available.
Book Synopsis Infrastructural Lives by : Stephen Graham
Download or read book Infrastructural Lives written by Stephen Graham and published by Routledge. This book was released on 2014-10-10 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructural Lives is the first book to describe the everyday experience and politics of urban infrastructures. It focuses on a range of infrastructures in both the global South and North. The book examines how day-to-day experience and perception of infrastructure provides a new and powerful lens to view urban sustainability, politics, economics, cultures and ecologies. An interdisciplinary group of leading and emerging urban researchers examine critical questions about urban infrastructure in different global contexts. The chapters address water, sanitation, and waste politics in Mumbai, Kampala and Tyneside, analyse the use of infrastructure in the dispossession of Palestinian communities, explore the pacification of Rio’s favelas in the run-up to the 2014 World Cup, describe how people’s bodies and lives effectively operate as ‘infrastructure’ in many major cities, and also explores tentative experiments with low-carbon infrastructures. These diverse cases and perspectives are connected by a shared sense of infrastructure not just as a ‘thing’, a ‘system’, or an ‘output,’ but as a complex social and technological process that enables – or disables – particular kinds of action in the city. Infrastructural Lives is crucial reading for academics, researchers, students and practitioners in urban studies globally.
Book Synopsis The Oxford Dictionary of English Etymology by : Charles Talbut Onions
Download or read book The Oxford Dictionary of English Etymology written by Charles Talbut Onions and published by . This book was released on 1976 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:
