The text is based on a course on turbomachinery which the author has taught since year 2000 as a technical elective. Topics include; Energy Transfer in Turbomachines, Gas and Steam Turbines, and Hydraulic Turbines. New material on wind turbines, and three-dimensional effects in axial turbomachines is included. The level is kept as such that students can smoothly move from a study of the most successful books in thermodynamics, fluid dynamics, and heat transfer to the subject of turbomachinery. The chapters are organized in such a way that the more difficult material is left to the later sections of each chapter. Thus, depending on the level of the students, instructors can tailor their course by omitting some sections. Key features: Combines theory and applications to show how gas turbines, pumps and compressor function Allows for a smooth transition from the study of thermodynamics, fluid dynamics, and heat transfer to the subject of turbomachinery for students and professionals Relates turbomachinery to new areas such as wind power and three-dimensional effects in axial turbomachines Provides information on several types of turbomachinery rather than concentrating specifically on one type such as centrifugal compressors The essential guide to turbomachinery that covers the fundamentals and much more A readily accessible and engaging reference work dealing with all aspects of an increasingly important field, 'Principles of Turbomachinery' addresses the wide range of different types of machines that transfer energy between a rotor and a fluid. The book combines theory with practical applications that show turbomachinery in action, including studies of gas turbines, pumps, and compressors. Designed to allow the reader to make the transition from earlier studies of thermodynamics, fluid dynamics, and heat transfer to the field of turbomachinery, it also looks at new developments, such as wind turbine development and three-dimensional effects in axial turbomachines. Organized to act as both a comprehensive study of turbomachinery as well as a resource that readers can dip into as needed, chapters are arranged in order of complexity, and can be read alone, and in or out of sequence, enabling readers to learn at their own pace, and tailor the book to meet their own unique needs. Designed for mechanical, chemical, and aeronautical engineers and students and professionals working in these fields, 'Principles of Turbomachinery' is also an important resource for environmental, petroleum, and agricultural engineers who need to gain a solid background in the field.