The Steam Injector
A theoretical and practical treatise on the design and operation of injectors and on the flow of fluids through and the design of nozzles.

C O N T E N T S. CHAPTER I . page Introduction. Definition of an Injector—Velocity Equation—Relation between Velocity, Mass, Momentum, and Kinetic Energy of Fluids of Differing Densities—Principle of Injector—Calculated Example—Test—Giffard Injector —Parts of an Injector and their Functions...... 1-6 CHAPTER II . The Steam Nozzle. Function of Nozzle—Design of Early Nozzles—Flow of Steam through Nozzles of Various Designs—Pressure Drop in Nozzle—Convergent and Divergent Nozzles— Under Expansion—Over Expansion—Velocity Equa- tions—Weight Flow Equations—Theory of Nozzle Design ....................................... ”-27 CHAPTER III . The Combining Nozzle. Determining features in Nozzle Design-—-Quantities to be considered—Length and Taper of Nozzle—Water Nozzle—Wear of Nozzle.........................28-31 CHAPTER IV . The Delivery Nozzle. Con version of Velocity into Pressure—E ff eet of Employing Diverging Nozzles—Design of Nozzles—Formulæ— Nozzle Throat-—Delivery Table—Area of Nozzle Throat—Conclusions—Losses in Nozzle...........32-46 CHAPTER V . Overflow Arrangements. Importance of Correct Overflow Arrangements—Pressure Variation in Combining Nozzle—Lifting Injectors— Flap Nozzles—Divided Overflow Chamber-—-Sliding Nozzles—Sliding Collars—Loading Overflow by Delivery Pressure—Tests—Various Special Arrange- ments ....................................... 47-68