1957. , 2nd edition
Preface
Since publication of the first edition of this book, the application of centrifugal pumps has been extended to new fields. At the same time the ranges of head per stage, total pressure, temperature, speed, and size have moved to new high levels. This advancement presented new problems—hydraulic, mechanical, metallurgical, and manufacturing. A considerable progress was achieved during the same period in the theoretical aspects and design procedure based on a better understanding of the flow processes through the parts comprising a centrifugal pump. Thus a new edition of this book at this time seemed well justified.
The theoretical treatment of the impeller action and casing performance and the method of presenting experimental information as used in the first edition have been retained. These have withstood the test of time very well. At the same time a successful application of the same technique to the field of turboblowers in the last decade has fuished added assurance of the soundness of such methods of attack. A number of new topics dealing with theory, design, and application are included. On the other hand, a number of articles were eliminated or condensed
to save space.
The major changes and additions are listed below:
A new chapter, "Water-Hammer Problems in Centrifugal Pump Systems, " has been added. With pump sizes and speeds increased, it is impossible for a pump designer or application engineer to escape water-hammer problems. This chapter will serve as an introduction to the subject. Chapter 18, dealing with centrifugal-jet pump systems, has been expanded and rewritten to a great extent. This chapter has brought forth more comments from the readers than any other chapter. The majority of illustrations in Chapters 16 and 17 were replaced with new ones. The problem of the shut-off head for axial and mixed flow impeller pumps is expanded in light of new experimental evidence. Principles of suction sump design for vertical propeller pumps are extended. A new viscosity correction chart is introduced in Chapter 14 covering a wider range of pump types. New complete characteristics of mixed flow and axial pumps are included in Chapter
13. Also a brief account of the progress in water storage pumps is given in the same chapter. A thermal cavitation criterion is introduced in Chapter 12 to correlate pump behavior with respect to cavitation when pumping liquids of different physical and thermal properties. New charts are given in Chapter 9 relating to impeller design for any discharge angle. At the same time a procedure is established to select the casing design elements to suit impellers. An improved method of the inlet velocity triangle construction is offered in Chapter 5.
A great number of minor improvements and refinements will be found throughout the book. Old chapter numbering and titles were retained for easy reference of readers familiar with the first edition. The first edition of this book has been translated into Japanese and arrangements are in progress to translate the second edition into German.
I am indebted to Ingersoll-Rand Company, Mr. R. H. Johnson, President, and to Mr. Hanns Hoschuch, Engineer-in-charge, Blower and Pump Engineering Department, whose support made this volume possible. Professor A. Hollander of the Califoia Institute of Technology and Mr. H. A. Stahl of Ingersoll-Rand Company have fuished numerous corrections and helpful suggestions.
Although great care has been exercised to check the manuscript and proofs, errors may be discovered. I shall appreciate it if these are called to my attention. I also invite criticism of the views presented in the book or suggestions which may lead to its improvement.
Content:
1 Selected Topics from Hydraulics
2 Definitions and Terminology
3 Theory of the Centrifugal Pump Impeller
4 Vortex Theory of Euler's Head
5 Specific Speed and Design Constants
6 Design of Mixed Flow Impellers for Centrifugal Pumps
7 Pump Casing
8 Axial Flow Pumps
9 Hydraulic Performance of Centrifugal Pumps
10 Leakage, Disk Friction, and Mechanical Losses
11 Axial Thrust
12 Cavitation in Centrifugal Pumps
13 Special Operating Conditions of Centrifugal Pumps
14 Special Problems of Pump Design and Application
15 Shaft Design for Critical Speeds
16 Special Problems and Applications of Vertical Turbine and Axial Flow Pumps
17 Special Problems and Applications of Centrifugal Pumps
18 Centrifugal-Jet Pump Water Systems
19 Water-Hammer Problems in Centrifugal Pump Systems
Index
Preface
Since publication of the first edition of this book, the application of centrifugal pumps has been extended to new fields. At the same time the ranges of head per stage, total pressure, temperature, speed, and size have moved to new high levels. This advancement presented new problems—hydraulic, mechanical, metallurgical, and manufacturing. A considerable progress was achieved during the same period in the theoretical aspects and design procedure based on a better understanding of the flow processes through the parts comprising a centrifugal pump. Thus a new edition of this book at this time seemed well justified.
The theoretical treatment of the impeller action and casing performance and the method of presenting experimental information as used in the first edition have been retained. These have withstood the test of time very well. At the same time a successful application of the same technique to the field of turboblowers in the last decade has fuished added assurance of the soundness of such methods of attack. A number of new topics dealing with theory, design, and application are included. On the other hand, a number of articles were eliminated or condensed
to save space.
The major changes and additions are listed below:
A new chapter, "Water-Hammer Problems in Centrifugal Pump Systems, " has been added. With pump sizes and speeds increased, it is impossible for a pump designer or application engineer to escape water-hammer problems. This chapter will serve as an introduction to the subject. Chapter 18, dealing with centrifugal-jet pump systems, has been expanded and rewritten to a great extent. This chapter has brought forth more comments from the readers than any other chapter. The majority of illustrations in Chapters 16 and 17 were replaced with new ones. The problem of the shut-off head for axial and mixed flow impeller pumps is expanded in light of new experimental evidence. Principles of suction sump design for vertical propeller pumps are extended. A new viscosity correction chart is introduced in Chapter 14 covering a wider range of pump types. New complete characteristics of mixed flow and axial pumps are included in Chapter
13. Also a brief account of the progress in water storage pumps is given in the same chapter. A thermal cavitation criterion is introduced in Chapter 12 to correlate pump behavior with respect to cavitation when pumping liquids of different physical and thermal properties. New charts are given in Chapter 9 relating to impeller design for any discharge angle. At the same time a procedure is established to select the casing design elements to suit impellers. An improved method of the inlet velocity triangle construction is offered in Chapter 5.
A great number of minor improvements and refinements will be found throughout the book. Old chapter numbering and titles were retained for easy reference of readers familiar with the first edition. The first edition of this book has been translated into Japanese and arrangements are in progress to translate the second edition into German.
I am indebted to Ingersoll-Rand Company, Mr. R. H. Johnson, President, and to Mr. Hanns Hoschuch, Engineer-in-charge, Blower and Pump Engineering Department, whose support made this volume possible. Professor A. Hollander of the Califoia Institute of Technology and Mr. H. A. Stahl of Ingersoll-Rand Company have fuished numerous corrections and helpful suggestions.
Although great care has been exercised to check the manuscript and proofs, errors may be discovered. I shall appreciate it if these are called to my attention. I also invite criticism of the views presented in the book or suggestions which may lead to its improvement.
Content:
1 Selected Topics from Hydraulics
2 Definitions and Terminology
3 Theory of the Centrifugal Pump Impeller
4 Vortex Theory of Euler's Head
5 Specific Speed and Design Constants
6 Design of Mixed Flow Impellers for Centrifugal Pumps
7 Pump Casing
8 Axial Flow Pumps
9 Hydraulic Performance of Centrifugal Pumps
10 Leakage, Disk Friction, and Mechanical Losses
11 Axial Thrust
12 Cavitation in Centrifugal Pumps
13 Special Operating Conditions of Centrifugal Pumps
14 Special Problems of Pump Design and Application
15 Shaft Design for Critical Speeds
16 Special Problems and Applications of Vertical Turbine and Axial Flow Pumps
17 Special Problems and Applications of Centrifugal Pumps
18 Centrifugal-Jet Pump Water Systems
19 Water-Hammer Problems in Centrifugal Pump Systems
Index