Water Jet Pump
The water jet pump, when designed with experimentally obtained optimum dimensions, can achieve efficiencies in the range of 35% to 40%. The design depends on the selected nozzles and diffuser,...

Water Hammer Resulting from Cavitating Pumps
In the transport of phosphate-ore slurry in a pipeline containing pumps in series, a pump will occasionally blow up. Previously, investigated failure that stemmed from water hammer, as...

Cavitation in Hydraulic Structures: Problems Created by Cavitation Phenomena
The damage from cavitation, which has been an increasing problem with the increasing size of hydraulic structures, often results from neglect in the design of these structures. Such design...

Cavitation in Hydraulic Structures: Scale Effects Involved in Cavitation Experiments
The general nature and purpose of experimental studies of cavitation-susceptible hydraulic structures is reviewed. Scale effects are defined as deviations in the cavitation occurrences...

Mechanics of Cavitation
A summary review of the knowledge related to the mechanism of cavitation is presented. Stability criteria for a spherical gas nucleus as well as the possible origins of such nuclei are...

Construction Finishes and High-Velocity Flow
Laboratory research and field experience shows that finish tolerances are essential and important for construction surfaces that are to support high-velocity water flows. Surface irregularities...

Expansion of a Cavity in a Saturated Clay Medium
A method of calculation is presented which makes it possible to determine the stress, strain, and pore pressure distribution resulting from the expansion of a spherical or a cylindrical...

Dynamic Stresses in an Elastic Cylinder
Dynamic stresses in an arbitrarily thick elastic cylinder in an infinite elastic medium during the passage of plane, compressional, harmonically time-varying waves are investigated. Dynamic...

Sudden Enlargements in Pipelines
Study of hydraulic characteristics of sudden enlargements formed by placing orifices and valves in pipe lines; efficiency of sudden enlargements as energy dissipators, their cavitation...

Prediction of Cavitation Damage
Cavitation damage theories since 1919 are cited and discussed; non-dimensional number, called cavitation damage number, is proposed, based on concept of dynamic indentations produced by...

Prediction of Cavitation Damage
Cavitation damage theories since 1919 are cited and discussed; non-dimensional number, called cavitation damage number, is proposed, based on concept of dynamic indentations produced by...

Spherical Waves in a Plastic Locking Medium
Asymptotic short-time and long-time solutions are derived in closed form for spherical wave propagation in infinite plastic locking medium; various types of time-varying pressures are...

Design Principles for Underground Salt Cavities
Design principles for construction of salt cavities as containers for high level radioactive waste; studies on reduction of cavity volume, development of plastic zone, and stress redistribution...

Design Principles for Underground Salt Cavities
Theoretical equilibrium relationships as substantiated by experimental studies are presented here for use in the design of salt cavities. Also included are studies on reduction of cavity...

Hydraulic Characteristics of Gate Slots
Flow turbulence within gate slots and cavitation damage just downstream from gate slots occur when wheel (or roller) gates and slide gates are operated at small openings under heads in...

Cavitation Damage of Roughened Concrete Surface
The paper discusses an exploratory laboratory study concerning the evaluation of the cavitation potential of various types of roughened concrete surfaces. Methods of evaluating the data...

Passage of Young Fish Through Turbines
Hypothesis developed that mortality among fish passing through turbines is caused mainly by exposure to cavitation; experimental procedure for subjecting fingerlings to pressures above...

Measurement of the Premeability of Tri-Axially Anisotrophic Soil
Effect on piezometer measurements of anisotropy in horizontal plane is analyzed; anisotropy does not significantly affect numerical value of shape factor of piezometer cavity; it may consequently...

Butterfly Valve Flow Characteristics
Flow coefficients given for free and submerged discharge as well as two cases with enclosed flow piping; effects of type of installation, blade shape and closure angle for control type...

A High Head Cavitation Test Stand for Hydraulic Turbines
Description of new closed circuit water tunnel and its value for testing model hydraulic turbines under high heads (up to 300 ft)....

 

 

 

 

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