Engineering Commons^™

Electrical Analogue Computer For The Heat Pump, James Edward Goff

Masters Theses

(Taken from the Summary)

Because of the complex behavior of a cylindrical heat source-sink under intermittent operating conditions, analysis by analytical means is very difficult. Therefore an electrical analogy computer consisting of a distributed resistance capacitance model was designed and built. It was shown analytically that the behavior of this computer model was the same as that of the heat system. That the model was a true analogy is verified by the fact that data obtained from this model could be used to check certain heat flow problems previously solved by analytical means. Data were obtained for a …

Calibration Of Weirs By Means Of Critical Flow And Specific Energy, Robert A. Rapp

Masters Theses

"For many years man has been relying more each day upon metering devices to measure the flow of fluids in industry. The orifice, orifice meter, venturi meter, pitot tube, nozzle, flume and the weir have been employed, each having its own particular advantage.

In this parade of metering progress, the contracted weir has long been the forgotten brother of the suppressed weir. In almost every textbook on hydraulics or fluid mechanics, the following words appear, "end contractions are to be avoided where the weir cannot be calibrated". This skepticism and the length or absurdity of some contracted weir formulas led …

Separation Of Copper And Zinc On Synthetic Resins, Ernest Joseph Breton

Masters Theses

"It was desired to know whether ion exchange resins could be of value to the metallurgist in the recovery and separation of metals. The recovery and separation of copper and zinc from dilute solutions on Amberlite IRC-50, a carboxylic resin, and Amberlite IR-120, a nuclear sulfonic resin, were investigated. It was found that Amberlite IRC-50 could effectively remove copper ions from a solution of copper and zinc. Amberlite IR-120, due to the strong sulfonic acid groups, exhibited only a slight preference for copper as compared to zinc. It would seem that a judicious choice of resins coupled with appropriate chemistry …

Analytical Investigation Of Bending Effects On The Stability Of A Tube Subjected To External Pressure, Charles Young

Masters Theses

"The behavior of thin and moderately thick-walled tubes under various types of loadings has been a major problem of several leading industries for many years. Predominant among these, and the one for which this thesis was primarily undertaken, is the oil industry. The problem attacked in this thesis, however, is not limited to that industry alone, having ample application in industries that are sub-marine in nature, or any industry in which the application of external pressures on equipment is likely to be responsible for buckling failures...In this thesis, the problem of finding the effect of bending on the collapsing pressure …

The Theory Of Limit Design As Applied To Column Analysis, John Francis Mccarthy

Masters Theses

"In any discussion of compression members of a structure, account has to be taken primarily of the relative "slenderness" or bending weakness of the member. If the member be so short that axial loading causes very slight deflection at any point throughout the member, it is usually designated a simple compression member and no account is taken of the additional stresses due to the deflection. When, however, the ratio of the length to the least radius of gyration of the member becomes so large that bending stresses cannot be ignored, the member is usually called a column and its consequent …

A Study Of Cast Eutectic Structures By Means Of Optical And X-Ray Microscopy, John Stanton Winston

Masters Theses

"The present research is the result of interest in two rather broad, and at first thought, seemingly entirely separate topics: the structure of eutectics and x-ray microscopy. D. Hanson in 1923 in his correspondence with Albert M. Portevin in regard to his article on the structure of eutectics states, "A point that always stuck him (D. Hanson) in examining eutectics was that one of the constituents always formed a continuous phase round the other one. The orientation of one constituent was either constant or varied in a uniform manner. What, however, was the condition of the 'enveloped' constituent, which formed …

An Experimental Study Of Crystallization In Opal Glass, William C. Rous

Masters Theses

"Opal glasses are well known from use in such forms as ointment jars, lighting globes, wall panelling [sic], and decorative effects in glass vases. Cryolite, fluorspar, and sodium fluosilicate are used in varying proportions in most glasses of this type. Since little is known of the mechanism of crystallization in opal glass, there is a definite need of gathering further information on this subject. This information is of particular interest to the manufacturers whose products consist of this type of glass. Further information would aid in control of the characteristics desired and perhaps would allow a more economical control"--Introduction, page …

Thermal Recovery Of Petroleum By Electrical Heating, Harold Roy Coffer

Masters Theses

"It is the purpose of this investigation to study the feasibility of recovering oil from laboratory size cores by passing electric current through the formation. If a voltage of sufficient magnitude could be applied to the formation to cause a flow of current, the formation would be heated. This heat should stimulate the flow of oil. The expansion of any gas present in the core together with the formation of hydrocarbon vapors should provide sufficient expulsive force to drive oil from the core. The effect of power expenditure, the necessary voltages, the changes of conductivity and power factor of the …

A Study Of Missouri Flint Clay, Edmond Preston Hyatt

Masters Theses

"The problem is one of attempting to explain the peculiar nature of Missouri Flint Clay and to expand the knowledge concerning it. Among the questions for which answers are sought are: What makes Missouri Flint Clay so hard? What happens to Missouri Flint Clay when it is ground? What is the mineralogical constitution of Missouri Flint clay?"--Introduction, The Problem, page 1.

The Development Of Plans For A National Airport For Ankara, Turkey, Mehmet Ragip Samli

Masters Theses

"'The present rapid development of general interest in aviation has brought to the front a new field of engineering. Development of the airplane has already reached a stage where the limit of its usefulness seems fixed only by the places which may be provided for taking off and landing. Due to the newness of the problem, not every one on whom responsibility rests recognizes the fact that the selection of the proper site and location for an airport is just as much an engineering problem as are its design and construction.'

The Turkish government began construction or the Ankara-Esenboga airport …

A Determination Of The Economic Feasibility Of Producing Marginal Gas Wells, Horace Tharp Mann

Masters Theses

"The purpose of this investigation is to show that it is economically feasible to produce marginal gas wells in such a manner that all the gas from the edge of the field will be captured by the first row of wells. In this problem the permeability of the sand is to be variable but known, and the effects of this variable permeability on the pressure distribution, and resulting gas production, will be discussed.

In many gas fields the point at which it is generally considered unprofitable to drill new wells is well inside the boundary of the reservoir. This is …

Calculations Of Maximum Sag Of A Transmission Line With An Ice Load On One Span, Rodney A. Schaefer

Masters Theses

"An important problem concerning electric power lines is the calculation of the maximum sag occurring when there is an ice load on only one span. The object of this thesis is to determine a practical method for calculating the maximum sag of a transmission line, suspended on suspension insulators, with the aforementioned loading conditions. This paper is limited to the case where the supports of the transmission line are at equal elevations and all span lengths are equal"--Introduction, page 1.

The Economic Spacing Of Contraction Joints In Reinforced Concrete Pavements, Wilbert Frederick Wegener

Masters Theses

"Structurally, there are two types of joints used in concrete pavements: (a) the tied, or permanently-closed joint; and (b) the open or free type of joint. The permanently closed joint utilized tie-steel of some form to keep the joint from opening. Usually, this steel is in the form of short individual bars extending across the joint and bonded to both slabs (designated as "tie-bars") or in the form of distributed reinforcement. The remaining method of classification, that of refering [sic] to the joint purpose, gives the expansion joint, contraction joint, and warping joint. An expansion joint is, as the name …

Principles And Practices Controlling The Use Of Earthmoving Equipment, Woodrow John Latvala

Masters Theses

"The purpose of this study is to show how the efficiency in earthmoving projects can be increased by the application of engineering principles. Efficiency can be increased by choosing equipment to fit the given set of conditions; and, having chosen the equipment, operate it at its maximum efficiency. In order to choose the right equipment it is necessary to study the conditions under which the equipment must operate. It is then necessary to study the machine in order to ascertain its adaptability to the existing conditions"--Introduction, page 1.

Efficiency Studies Of The Effect Of Moisture On The Power Consumption Of Mine Scrapers, Georges J. Vigier

Masters Theses

"Many years of practice have resulted in the standardization of several types of scrapers which are now commonly manufactured for use in mining. Although experience has brought out much information on scraping operations, no systematic studies of the efficiency of mine scrapers have been carried out before the experimental works done in the last few years at Missouri School of Mines and Metallurgy. "Purpose of Problem": The purpose of this present study is to consider the effect which moisture in the muck has on the efficiency as regards power consumption and amount of material scraped, of different types of mine …

Economical Span Length Ratios For Three-Span Continuous Girder Bridges, Donald Hindrik Timmer

Masters Theses

"The three-span continuous bridge is one of the most popular bridges used by highway departments at the present time. The low first cost and overall economy combined with the pleasing appearance of this type of bridge as compared to simple span structures has led most highway departments to use continuous spans whenever conditions permit. The design of three-span continuous bridges, as well as the design of any of the other bridge types, is usually carried out as an analysis rather than a design. In the case of the three-span continuous girder, with rolled steel beams, an initial assumption as to …

A Study Of Mine Scraper Efficiency On Materials Of Different Specific Gravities, Kermit Guy Rowley

Masters Theses

"The purpose of this study is to determine the effect that the specific gravity of the material scraped has on the power consumption and the efficiency of the common types of mine scrapers. As scraper weight, rope speed, and moisture content of the muck are important factors affecting the power consumption and efficiency, these variables are the ones considered for each type scraper. Two materials of different specific gravities are used in the study with an equal number of tests run on each material"--Introduction, Purpose of Problem, page 2.

A Study Of The Efficiency Of Split-Second Delay Electric Blasting Caps In Underground Limestone Mining, John B. H. Fitzwilliam

Masters Theses

"The introduction of electric blasting caps have delay intervals of the order of one-half to one second proved of advantage in many aspects of underground mining, particularly development work. Their use spread, until they now supersede fuse-and-cap firing wherever possible. Split-second delay electric blasting caps are a comparatively recent development from conventional delay caps. They have been found of practicable use in quarrying operations, and have been applied in many phases of underground mining. While evidence, to show that short-delay firing in quarrying is more efficient than instantaneous firing, is becoming increasingly conclusive, it remains to be proved that split-second …

The Study Of Effect Of Definite Grain Sized Sand On The Shearing Strength Of Clays, Faruk Omer Akkoseoglu

Masters Theses

"Slopes of all kinds, including mountains, hills, sea coast bluffs, river banks, and man made cuts and fills, stay in place only because of the shearing strength possessed by the soil or rock of which they are composed. The resistance of soils to shearing strength is probably the most important of all the soil properties to foundation engineers. Most of the serious structural failures which are due to unexpected soil behaviour are caused by deficiency in the shearing strength of the soil. Water, on the other hand, possesses no static strength in shear, therefore bodies of water have no surface …

Hydraulic Scale For Measurement Of Dynamometer And Other Forces, John Richard Barton

Masters Theses

"The object of this investigation is to design, build, test, and develop, a hydraulic type scale primarily to be used for measuring dynamometer forces. The scale however is not limited to use on dynamometers, but may be used for other types of force measurements such as the continuous weighing of material on a conveyor belt in conjunction with a recording pressure gage. The scale has numerous applications in determining forces where conventional scales are now used. This particular subject was chosen because of the need for a convenient, inexpensive, and accurate scale for use in measuring the force exerted by …

The Nature Of Molecular Films Of Oleic Acid On Quartz, Kenneth Lee Keating

Masters Theses

"The purpose of this research was to show the nature of oleic acid on quartz mineral by transferring calcium oleate films, known to be monomolecular and of a definite orientation, to the surface of a piece of quartz, and measuring the resulting coated mineral by contact angle technique"--Introduction, page 1.

A Comparative Study Of Some Rock Drill Bits, Charles Roger Knopp

Masters Theses

"The detachable single-use rick-drill bit has attracted considerable attention in the mining industry of the United States during the past few years. While this type of bit has been used for some time in other countries, it has been only recently that these bits have been manufactured in the United States. It was decided to test this type of bit and make a comparative study of a single-use bit and a widely used detachable rock-drill bit"--Introduction, page 1.

Effects Of Sand Admixtures On The Physical Properties Of Soils, Necati Kanatsiz

Masters Theses

"The purpose of this study is to determine the effects of sand admixtures on the physical properties of soils. Soil may be defined as a heterogenous [sic] collection of rock and mineral fragments whose decomposition and disintegration have been brought about by the action of physical, chemical, and biological forces, working singly or in combination...In the conviction that the study of soils, with respect to highway engineering, is becoming more and more important this study was undertaken in order to learn whether the addition of sand would lead to desirable results, and if not, at least secure some further addition …

Periodic Heat Flow In A Semi-Infinite Solid, Warren George Heidbrier

Masters Theses

"The object of this investigation is to determine by analytical means the temperature within a homogeneous semi-infinite solid, as a function of time, while the solid is receiving heat periodically by radiation on its one flat surface. Periodic heat flow means that heat flow is a continuous function of time and repeats itself at regular intervals. A semi-infinite solid has only one bounding plane and extends to infinity in all other directions...Much of this work deals with the soil temperatures of the earth both at the surface and at various depths. The surface of the earth is subjected to daily …

Velocity Studies In A Vertical Pipe Flowing Full, Robert Franklin Tindall

Masters Theses

"The purpose of this investigation is to install a hard drawn copper pipe approximately 1/2 inch in diameter, and approximately 35 feet long in a vertical position. The copper pipe is to have pressure takeoff points at various distances along the length of the pipe. The purpose of these takeoffs is to measure the pressure of the water at the point of takeoff in the pipe. The water is to be forced into the pipe, assisted by gravity, thereby causing a pressure of some measurable quanity [sic] greater than absolute zero pressure. The discharge was to be by volumetric measurement, …

Design And Test Of An Apparatus For Rate Measurements Of Rapid Gas Reactions, Erich Rolaff

Masters Theses

"The present study on rapid gas reactions was initiated with two main goals in view. The first objective was the development of equipment and methods for the treatment of problems arising in extremely rapid gas phase reactions. In recent years, with the advent of large scale applications of gas turbines and rocket motors, the process of high speed gas reactions, especially those of combustion and oxidation have become of increasing importance...The second main goal of the work was to apply the methods and equipment developed to the investigation of chemical systems of interest"--Introduction, page 1-2.

Effect Of Removed Web-Section On Critical Load For I-Beam Columns, Henri Simon Rigo

Masters Theses

"This investigation deals with a series of column tests of aluminum I-sections which have a perforated web. Specifically, the tests show that the weight is decreased without decrease in strength. Several basic assumptions are made in the design of a column. The physical action of a column is idealized in the derivation of formulae which will predict within reasonable limits the load which the member will sustain. In a given installation of non-homogeneity of material, kinks, uneven bearing, lack of symmetry due to riveting or welding, stress concentration and many other disturbing factors not in agreement with these assumptions may …

The Temperature Within A Homogeneous Plate Of Finite Thickness, Charles R. Remington

Masters Theses

"The object of this thesis is to determine by an analytical method the temperature within a homogeneous plate of finite thickness subjected to a constant temperature on one side and a periodic fluctuating temperature, expressible in a Fourier series, on the opposite side. This problem in periodic temperature changes has not, to the author's knowledge, been solved previously. The flow of heat in the problem is considered in only one direction, the x-direction. Flow in the other two directions is considered negligible, or zero. Periodic temperature changes in the earth are of importance. The temperature changes have been used by …

The Application Of The Relaxation Method To The Solution Of Steady-State Heat Transfer Through A Concentric Square Insulator, William Edward Simpkin

Masters Theses

"It is the object of this thesis to express the relationship between the heat transfer through a square insulator of variable inside-outside dimension ratios, in terms of a concentric round insulator of the same inside-outside diameter ration, by means of a continuous curve. Mathematically speaking, this thesis will have a plot of a variable coefficient, c_s, to be used...in terms of the ratio of the width of the outside square to the width of the inside square"--Statement of Problem, page 8.

Flood Control With Retarding Basin Type Reservoirs In Meramec Basin, Missouri, Ilhan Kaya Ozbilen

Masters Theses

"When rainfall occurs that provides more runoff than can be carried within the normal channels of existing streams a flood results. The excess water overflows the valley lands, invades developed areas, and causes destruction of property or, in extreme cases, loss of human life...Many structures are built to control water: Waterways of proper depth and width provide arteries of transportation; water controlled and discharged through water-wheels provides power; water may be caught in storage basins and distributed for irrigation or water supply; and water that is an actual or potential source of damage or danger to property or to human …