Fatigue failures of blades is one of the most vexing problems of turbomachine manufacturers, ever since the steam turbine became the mainstay for power generating equipment and gas turbines are increasingly used in air transport. The problem is very complex, involving the excitation due to aerodynamic stage interaction; damping due to material deformation, friction at slip surfaces and aerodynamic damping; vibration of an aysmmetric aerofoil tapered along its length and mounted on a rotating disc at a stagger angle. The problem is also governed by heat transfer analysis and thermal stresses.
This book deals with a basic understanding of free vibratory behaviour of turbine blades -- free standing, packetted, and bladed-discs. The analysis is based on continuous and discrete models using energy principles and finite element techniques. A clear understanding of the interference phenomenon in thin cambered airfoil stage in subsonic flow is presented to determine the nonsteady excitation forces acting on the blades. A comprehensive treatment on the blade damping phenomenon that occurs in turbines is given. The nonlinear damping models account for material damping and friction damping as a function of rotational speed for each mode. Resonant response calculation procedures for the steadily-running as well as accelerating blades are given. Cumulative damage calculations are then outlines for fatigue life estimation of turbomachine blades. The book also deals with heat transfer analysis and thermal stress calculations which help in a comprehensive understanding of the blade problems.

Turbomachine Blade Vibration

Engineering & Transportation

Rao, J.S.

Engineering

New Age

Digital Control Engineering

M. Gopal

This text/reference presents practical maximum-entropy models used in both the hard and the soft sciences. The basic theory of the maximum-entropy principle is explained, followed by detailed applications in numerous areas of science, business and economics, including thermodynamics, mechanics, statistics, design of experiments, time-series analysis, queuing and decision theory. Contains more than 600 specially constructed exercises.

Maximum Entropy Models in Science and Engineering

Science & Math

Kapur, Jagat Narain

Physics

Fatigue failures of blades is one of the most vexing problems of turbomachine manufacturers, ever since the steam turbine became the main stay for power generating equipment and gas turbines are increasingly used in the air transport. The problem is very complex, involving the excitation due to aerodynamic stage interaction; damping due to material deformation, friction at slip surfaces and aerodynamic damping; vibration of an asymmetric aerofoil tapered along its length and mounted on a rotating disc at a stagger angle. The problem is also governed by heat transfer analysis and thermal stresses. His book deals with a basic understanding of free vibratory behaviour of turbine blades- free standing, packetted, and bladed-discs. The analysis is based on continuous and discrete models using energy principles and finite element techniques. A clear understanding of the interference phenomenon in a thin cambered airfoil stage in subsonic flow is presented to determine the nonsteady excitation forces acting on the blades. A comprehensive treatment on the blade damping phenomenon that occurs in turbines is given. The nonlinear damping models account for material damping and friction damping as a function of rotational speed for each mode. Resonant response calculation procedures for the steadily running as well as accelerating blades are given. Cumulative damage calculations are then outlined for fatigue life estimation of turbomachine blades. The book also deals with heat transfer analysis and thermal stress calculations which help in a comprehensive understanding of the blade problems. About the author: prof. J.s. Rao (hons.), m. Tech, ph.d., d.sc, taught at the indian institute of technology, kharagpur and delhi for over 30 years. He has also taught at the university of surrey, as a

This is the first Indian publication devoted solely to stepper motors. It covers all aspects of stepper motors: construction, operation and characteristics of stepper motors; electronic as well as microprocessor based controllers for stepper motors; stepper motor applications in control, instrumentation, computer peripheral devices, CNC systems, robotics, etc.; and stepper motor analysis and design. Furthermore, the book contains certain special features which have appeared, perhaps for the first time, in a book of this nature such as the latest REMP disk magnet stepper motor micro-stepping controller, etc. Certain Indian contributions to stepper motor controller technology have been highlighted in microprocessor-based controllers for stepper motor. For practising engineers and students, selection and sizing of stepper motor has been discussed in detail and illustrated with typical illustrative examples.

Stepper Motors: Fundamentals, Applications and Design

V. V. Athani

This book is about the principles of irrigation and also discusses its general features along with water resources engineering.irrigation and water resources engineering talks about the revolutionary improvements and advancements in the field. The book starts off with an elaborate introduction on irrigation along with a discussion on its effects on the human environment, the different water resources in india. The book also discusses the need and development of irrigation in the country, the different kinds of irrigation schemes available, planning of various irrigation projects along with details on crops and crop seasons.the chapters in the book include hydrology, soil-water relations and irrigation methods, groundwater and wells and canal irrigation. The book also has chapters on the management of canal irrigation, hydraulics of alluvial channels, design of stable channels and canal regulation structures. The book then proceeds on with detailed chapters on cross-drainage structures, rivers and river training methods, canal head works, planning of water resource projects, embankment and gravity dams and spillways.irrigation and water resources engineering is written by g l asawa. It was published by new age publishers in 2008 and is available in paperback. Key features: this book has 16 chapters discussing key aspects of the subject.the author has included solved and unsolved exercises at the end of each chapter along with a list of references.

Irrigation and Water Resources Engineering

G. L. Asawa

This book primarily written to meet the needs of practicing engineers in a large variety of industries where reciprocating machines are used, although all of the material is suitable for college undergraduate level design engineering courses. It is expected that the reader is familiar with basic to medium level calculus offered at the college undergraduate level. The first chapter of the book deals with classical vibration theory, starting with a single degree of freedom system, to develop concepts of damping, response and unbalance. The second chapter deals with types and classification of reciprocating machines, while the third chapter discusses detail-design aspects of machine components. The fourth chapter introduces the dynamics of slider and crank mechanism, and provides explanation of the purpose and motion of various components. The fifth chapter looks into dynamic forces created in the system, and methods to motion of various components. The fifth chapter looks into dynamic forces created in the system, and methods to balance gas pressure and inertia loads. The sixth chapter explains the torsional vibration theory and looks at the different variables associated with it. Chapter seven analyzes flexural vibrations and lateral critical speed concepts, together with journal bearings and their impact on a rotating system. Advanced analytical techniques to determine dynamic characteristics of all major components of reciprocating machinery are presented in chapter eight. Methods to mitigate torsional vibrations in a crankshaft using absorbers are analyzed in close detail. Various mechanisms of flexural excitation sources and their response on a rotor-bearing system are explored. Stability of a rotor and different destabilizing mechanisms are also included in this chapter. Techniques in vibration measurement and balancing of reciprocating and rotating systems are presented in chapter nine...

Reciprocating Machinery Dynamics by A.S. Rangwala (2006-12-01)

A.S. Rangwala

The book entitled "Cyanobacteria" is and outcome of the author's twenty years experience in Algology. There is no such textbook or a reference book exclusively on this topic. Cyanobacteria is a group of organisms which have enormous evolutionary, ecological, economic and environmental significance specially with regard to human benefit naturally, it is vary important to have a clear and in-depth knowledge about the various aspects of cyanbacterial origin, evolution, variations in morphology, ultra structure, biochemistry, genetics, factors relating to cellular differentiation, enzymes synthesis, response to environmental variation (e g chromatic adaptation), ecological strategic of survival, production of toxins and benefits derived from these organisms for book. Great care has been taken to explain the fundamental aspects to the undergraduate students of botany, Microbiology, Biotechnology and Life Sciences. Though the syllabi of various Indian universities have been taken into consideration an effort has been made to develop a knowledge base regarding these fascinating organisms. Various metabolic pathways functioning within the cyanobacterial cell have been described with suitable diagrams. Molecular aspects of various cellular functioning have been nicely depicted.

Cyanobacteria

Samit Ray

Biological Sciences

Barron`s American Accent Training (5 CD Free)

Ann Cook

With the view to attain higher reliability in power system operation, the quality assurance in the field of distribution and power transformers has claimed growing attention. Besides new developments in the material technology and manufacturing processes of transformers, regular diagnostic testing and maintenance of any engineering product may be ascertained by ensuring:* right selection of materials and components and their quality checks.* application of correct manufacturing processes any systems engineering.* the user`s awareness towards preventive maintenance.The successful performance of the product can only be assured once these three independent functioning authorities join hands together for the common cause i.e., `QUALITY ASSURANCE`. Without this tie up we cannot expect uniform quality with satisfactory performance and longer life span of the products. With a view to create, distribute and speed the message of quality with an objective of making `Made in India` level a symbol of quality in The world market, responsibility of each functionaries need to be identified. Keeping the above in mind the contents of the book is divided in five sections.

Power Transformers Quality Assurance

Indrajit Dasgupta

See the best price to sell, buy or rent books by the New Age publisher. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

Books by New Age

See the best price to sell, buy or rent books by the New Age publisher. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

Turbomachine Blade Vibration

Digital Control Engineering

Maximum Entropy Models in Science and Engineering

Turbomachine Blade Vibration

Stepper Motors: Fundamentals, Applications and Design

Irrigation and Water Resources Engineering

Reciprocating Machinery Dynamics by A.S. Rangwala (2006-12-01)

Cyanobacteria

Barron`s American Accent Training (5 CD Free)

Power Transformers Quality Assurance