Cavitation Instabilities and Rotordynamic Effects in Turbopumps and Hydroturbines


Book Description

The book provides a detailed approach to the physics, fluid dynamics, modeling, experimentation and numerical simulation of cavitation phenomena, with special emphasis on cavitation-induced instabilities and their implications on the design and operation of high performance turbopumps and hydraulic turbines. The first part covers the fundamentals (nucleation, dynamics, thermodynamic effects, erosion) and forms of cavitation (attached cavitation, cloud cavitation, supercavitation, vortex cavitation) relevant to hydraulic turbomachinery, illustrates modern experimental techniques for the characterization, visualization and analysis of cavitating flows, and introduces the main aspects of the hydrodynamic design and performance of axial inducers, centrifugal turbopumps and hydo-turbines. The second part focuses on the theoretical modeling, experimental analysis, and practical control of cavitation-induced fluid-dynamic and rotordynamic instabilities of hydraulic turbomachinery, with special emphasis on cavitating turbopumps (cavitation surge, rotating cavitation, higher order cavitation surge, rotordynamic whirl forces). Finally, the third part of the book illustrates the alternative approaches for the simulation of cavitating flows, with emphasis on both modeling and numerical aspects. Examples of applications to the simulation of unsteady cavitation in internal flows through hydraulic machinery are illustrated in detail.




Cavitation and Associated Phenomena


Book Description

Cavitation is a dangerous process which destroys objects in a fluid. Scientific description of this multifaceted phenomenon is based on almost every area of physics, and many interesting effects are connected with cavitation. The most intriguing of them is sonoluminescence – the light emitted from a cavitating fluid. This book presents a full-scale description of cavitation: from the basic thermodynamic principles to special phenomena associated with this complex process, from the dynamics of a single gas cavity to the catastrophic macroscopic manifestations, from the domestic observations to the nuances of X-ray spectroscopic research.




Hydrodynamic Cavitation


Book Description

Hydrodynamic Cavitation A systematic introduction to critical technologies and applications of hydrodynamic cavitation In Hydrodynamic Cavitation: Devices, Design, and Applications, a distinguished team of researchers delivers an authoritative discussion of key aspects of hydrodynamic cavitation, including the design, characterization, and modeling of the devices. The book offers discussions of state-of-the-art applications of the technology, including the disinfection of water, wastewater treatment, biomass processing, and many other industrial applications. In addition to expansive case studies, the book provides an up-to-date exploration of emerging innovations and future applications of the technology. Readers will also find: A thorough introduction to hydrodynamic cavitation devices, including those based on axial and rotational flows An in-depth examination of the experimental characterization of cavitation devices and computational models Comprehensive explorations of the applications of hydrodynamic cavitation, including the disinfection of water and wastewater treatment Accessible discussions of industrial applications of hydrodynamic cavitation Perfect for chemical and process engineers, water chemists, mechanical engineers, and food chemists, Hydrodynamic Cavitation will also earn a place in the libraries of food and environmental technologists.




Hydrodynamics of Pumps


Book Description

Hydrodynamics of Pumps is a reference for pump experts and a textbook for advanced students. It examines the fluid dynamics of liquid turbomachines, particularly pumps, focusing on special problems and design issues associated with the flow of liquid through a rotating machine. There are two characteristics of a liquid that lead to problems and cause a significantly different set of concerns than those in gas turbines. These are the potential for cavitation and the high density of liquids, which enhances the possibility of damaging, unsteady flows and forces. The book begins with an introduction to the subject, including cavitation, unsteady flows and turbomachinery, basic pump design and performance principles. Chapter topics include flow features, cavitation parameters and inception, bubble dynamics, cavitation effects on pump performance, and unsteady flows and vibration in pumps - discussed in the three final chapters. The book is richly illustrated and includes many practical examples.




Vibration of Hydraulic Machinery


Book Description

Vibration of Hydraulic Machinery deals with the vibration problem which has significant influence on the safety and reliable operation of hydraulic machinery. It provides new achievements and the latest developments in these areas, even in the basic areas of this subject. The present book covers the fundamentals of mechanical vibration and rotordynamics as well as their main numerical models and analysis methods for the vibration prediction. The mechanical and hydraulic excitations to the vibration are analyzed, and the pressure fluctuations induced by the unsteady turbulent flow is predicted in order to obtain the unsteady loads. This book also discusses the loads, constraint conditions and the elastic and damping characters of the mechanical system, the structure dynamic analysis, the rotor dynamic analysis and the system instability of hydraulic machines, including the illustration of monitoring system for the instability and the vibration in hydraulic units. All the problems are necessary for vibration prediction of hydraulic machinery.




Fluid Machinery and Fluid Mechanics


Book Description

"Fluid Machinery and Fluid Mechanics: 4th International Symposium (4th ISFMFE)" is the proceedings of 4th International Symposium on Fluid Machinery and Fluid Engineering, held in Beijing November 24-27, 2008. It contains 69 highly informative technical papers presented at the Mei Lecture session and the technical sessions of the symposium. The Chinese Society of Engineering Thermophysics (CSET) organized the First, the Second and the Third International Symposium on Fluid Machinery and Fluid Engineering (1996, 2000 and 2004). The purpose of the 4th Symposium is to provide a common forum for exchange of scientific and technical information worldwide on fluid machinery and fluid engineering for scientists and engineers. The main subject of this symposium is "Fluid Machinery for Energy Conservation". The "Mei Lecture" reports on the most recent developments of fluid machinery in commemoration of the late professor Mei Zuyan. The book is intended for researchers and engineers in fluid machinery and fluid engineering. Jianzhong Xu is a professor at the Chinese Society of Engineering Thermophysics, Chinese Academy of Sciences, Beijing.




Fluid Dynamics of Cavitation and Cavitating Turbopumps


Book Description

The book focuses on the fluid dynamics of cavitation with special reference to high power density turbopumps, where it represents the major source of performance and life degradation. While covering the more fundamental aspects of cavitation and the main kinds of cavitating flows, there is focus on the hydrodynamics and instabilities of cavitating turbopumps. The book also illustrates the alternative approaches for modeling and engineering simulation of cavitating flows.







Handbook of Rotordynamics


Book Description

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.




Pump Handbook


Book Description

Rely on the #1 Guide to Pump Design and Application-- Now Updated with the Latest Technological Breakthroughs Long-established as the leading guide to pump design and application, the Pump Handbook has been fully revised and updated with the latest developments in pump technology. Packed with 1,150 detailed illustrations and written by a team of over 100 internationally renowned pump experts, this vital tool shows you how to select, purchase, install, operate, maintain, and troubleshoot cutting-edge pumps for all types of uses. The Fourth Edition of the Pump Handbook features: State-of-the-art guidance on every aspect of pump theory, design, application, and technology Over 100 internationally renowned contributors SI units used throughout the book New sections on centrifugal pump mechanical performance, flow analysis, bearings, adjustable-speed drives, and application to cryogenic LNG services; completely revised sections on pump theory, mechanical seals, intakes and suction piping, gears, and waterhammer; application to pulp and paper mills Inside This Updated Guide to Pump Technology • Classification and Selection of Pumps • Centrifugal Pumps • Displacement Pumps • Solids Pumping • Pump Sealing • Pump Bearings • Jet Pumps • Materials of Construction • Pump Drivers and Power Transmission • Pump Noise • Pump Systems • Pump Services • Intakes and Suction Piping • Selecting and Purchasing Pumps • Installation, Operation, and Maintenance • Pump Testing • Technical Data