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The book has been written to provide an overa11 view for the experienced engineer working in a specia1ized aspect of the subject and for the young engineering graduate or undergraduate student who is being exposed to the turbomachinery fie1d for the first time. The book wi11 be very usefu1 as a textbook for undergraduate turbomachinery courses as we11 as for in-housecompany training programs re1ated to the petrochemica1， power generation， and offshore industries.
The use of gas turbines in the petrochemica1， power generation， and off-shore industries has mushroomed in the past few years. In the past 10years， the power industry has embraced the Combined Cyc1e Power P1ants and the new high efficiency gas turbines are at the center of this growth segment of the industry. This has a1so 1ed to the rewriting of chapters 1and 2. It is to these users and manufacturers of gas turbines that this book is directed. The book wi11 give the manufacturer a g1impse of some of the prob1ems asso-ciated with his equipment in the fie1d and he1p the user to achieve maximum performance efficiency and high avai1abi1ity of his gas turbines.
I have been invo1ved in the research，design， operation， and maintenance of gas turbines since the ear1y 1960s. I have a1so taught courses at the graduate and undergraduate 1eve1 at the University of Ok1ahoma and TexasA&M University， andnow， in genera1， to the industry. There have been over3，000 students through my courses designed for the engineer in the fie1d representing over 400 companies from around the wor1d. Companies have
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Preface
used thebook， and their comments have been very inf1uentia1 in the updat-ing of materia1 in the second edition. The enthusiasm of the students asso-ciated with these courses gave me the inspiration to undertake this endeavor. The many courses I have taught over the past 25 years have been an educationa1 experience for me as we11 as for the students. The Texas A&MUniversity Turbomachinery Symposium， which I had the privi1ege to orga-nize and chair for over eight years and be part of the Advisory Committeefor 30years， is a great contributor to the operationa1 and maintenance sections of this book. The discussions and consu1tations that resu1ted from my association with high1y professiona1 individua1s have been a major con-tribution to both my persona1 and professiona1 1ife as we11 as to this book.
In thisbook， I have tried to assimi1ate the subject matter of various papers(and sometimes diverse views) into a comprehensive， unified treatment ofgas turbines. Many i11ustrations，curves， and tab1es are emp1oyed to broaden the understanding of the descriptive text. Mathematica1 treatments are de1iberate1y he1d to a minimum so that the reader can identify and reso1veany prob1ems before he is ready to execute a specific design. In addition， the references direct the reader to sources of information that wi11 he1p him to investigate and so1ve his specific prob1ems. It is hoped that this book wi11 serve as a reference text after it has accomp1ished its primary objective of introducing the reader to the broad subject of gas turbines.
I wish to thank the many engineers whose pub1ished work and discussions have been a cornerstone to this work. I especia11y thank a11 my graduate students and former co11eagues on the facu1ty of Texas A&M University without whose encouragement and he1p this book wou1d not be possib1e. Specia1 thanks go to the Advisory Committee of the Texas A&M UniversityTurbomachinery Symposium and Dr. M. Simmang， Chairman of the TexasA&M University Department of Mechanica1叫ngineering， who were instru-menta1 in the initiation of the manuscript.
I wish to acknow1edge and give specia1 thanks to mywife， Zarine， for her readiness to he1p and her constant encouragement throughout this project.
I sincere1y hope that this new edition wi11 be as interesting to read as it was for me to write and that it wi11 be a usefu1 reference to the fast-growing fie1d of turbomachinery.
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燃气涡轮工程手册 Gas Turbine Engineering Handbook 1(4)
