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PREFACE:

The first edition of this text was published in 1984 by the MIT Press. It was received with kindness, and forty-six instructors in charge of turbo machinery and turbine courses reported that they had adopted the book at their universities.

 I spent a few weeks basking in the glow of what I happily thought was a long job well done. While I was working on a sabbatical at GE Aircraft Engines, someone told me that he had ordered over sixty copies for the company’s design engineers. 

I felt that this was equivalent to winning a Pulitzer prize, and my modesty was severely challenged. However, this wide use brought in a great deal of feedback, soon indicating that a second edition was needed to incorporate improvements in treatment, update examples, and correct some errors. The second edition, for which Theodosios Korakianitis joined as coauthor, was published in 1998 by Prentice Hall. 

We had several aims for a second edition. We wanted to reduce errors to a minimum, of course. We also introduced new flow correlations into chapter 3 (cycle thermodynamics), and extended the cycles to include the principal aircraft-engine types. We wanted to rationalize the treatment of preliminary and detailed design by taking energy transfer in turbomachines (chapter 5) further so that a great deal of preliminary design (arriving at the overall size and shape of a machine) could be done with the material in that chapter. More detailed  design  of  axial-flow  turbines  and  compressors  and  of  radial-flow  turbomachines  in chapters 7, 8, and 9 became, we hope, more useful and more consistent.

 We also took three-dimensional design (chapter 6) to a more practical level, and extended heat-exchanger design (chapter 10) considerably. Every chapter was updated in various ways. Many chapters had what we have termed “illustrations” to distinguish them from “figures.” The latter are part of and are referred to in the text. “Illustrations” are photographs or cutaway drawings of machines or components, generally accompanied by a commentary on their design aspects. Many people helped us. Some we have acknowledged in the text. We have been allowed to use a wide variety of graphs, diagrams, and photos for the figures.

 Our students then at Washington University in St. Louis and at MIT contributed materially, sometimes unwittingly, as tryouts for our methods. Andrew R. Mech of the Rose-Hulman Institute of Technology with his students J. Lawrence Elkin and William Mathies went through the first edition and through a draft of the second edition in great detail and dedication, giving us many useful recommendations and feedback. Aristide F. Massardo, on the faculty of the University of Genoa, also reviewed the second edition and offered valuable suggestions.