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Articles 541  568 of 568
FullText Articles in Mechanical Engineering
Effect Of Viscosity On The Cetane Number Of A Diesel Fuel, Moris Bolay
Effect Of Viscosity On The Cetane Number Of A Diesel Fuel, Moris Bolay
Masters Theses
"The object of this paper is to determine or rather experimentally establish the effect of a change in viscosity of a given diesel oil in regard to the ignition quality (cetane rating) of the oil.
The author did not attempt to prove why or find out how much the cetane number was affected. But, merely, tried to experimentally verify the fact that the cetane number of the fuel used underwent a change when its viscosity was decreased by preheating it.
Since his professional interests lie in the field of automotive engineering, several thesis problems were suggested to him by Dr ...
The Effect Of Various Binders And Moisture Content On The Apparent Thermal Conductivity Of Green Foundry Sand, Robert V. Wolf
The Effect Of Various Binders And Moisture Content On The Apparent Thermal Conductivity Of Green Foundry Sand, Robert V. Wolf
Masters Theses
"The broad field of heat transfer is well developed in its theory and mathematics, however, some few applications of varying heat transfer rates have been explored only recently.
Previous to the nineteenthirties, foundrymen had apparently been interested in heat transfer measurements only from the standpoint of the melting of metals and the heat treatment of the finished castings, with the rate of solidification and the transfer of heat from the casting through the mold being ignored, or at least accepted as an uncontrollable factor. This does not apply, of course, to the use of metal chills to adjust solidification rates ...
Photoelastic Investigation Of Notched Corners In Square Apertures In Flat Plates Subjected To Tension, Lloyd E. Byrd Jr.
Photoelastic Investigation Of Notched Corners In Square Apertures In Flat Plates Subjected To Tension, Lloyd E. Byrd Jr.
Masters Theses
"Photoelastic stress analysis is one of the most effective methods available to the engineer for solving problems of stress distribution. The effect of forces, such as pressure and tension may be studied using a scale model of a structural part. Special transparent models are subjected to forces proportional to those acting on the real object. The stress problem produced in the model indicates the stress distribution through a crosssection of the structural part.
Analysis of the photographic record of the stress analysis pattern provides data with a high degree of accuracy within a relatively short time. In simple cases, this ...
Air Flow Through Cloth Screening, Kurt Rauf Basakinci
Air Flow Through Cloth Screening, Kurt Rauf Basakinci
Masters Theses
"The object of this investigation is to obtain an expression whereby flow of air through woven cloth can be predicted with a reasonable degree of accuracy, in terms of the pressure drop across the screen, the density, the viscosity of the air flowing; these latter properties being functions of the pressure and temperature of the air.
The development of an expression from which to predict the relationship between the air flow through a screen and the pressure drop across it without resort to experimental procedure seems to the author to be worthwhile undertaking.
The chief aim of this investigation was ...
The Effect Of A Uniform Layer Of Insulation On The Temperature Amplitude In Periodic Heat Flow, Ralph E. Schowalter
The Effect Of A Uniform Layer Of Insulation On The Temperature Amplitude In Periodic Heat Flow, Ralph E. Schowalter
Masters Theses
"The object of this thesis is to determine by analytical methods the temperature at any time within a homogeneous semiinfinite solid protected by a uniform layer of insulation, while its one and only one plane face is subjected to a periodically fluctuating temperature. The temperature at an infinite distance within the solid is to remain constant, and the heat flow in the other two directions is to be considered negligible.
Periodically fluctuating temperatures are frequent in both nature and engineering. The surface of the earth is subjected to temperature changes which are very nearly periodic, and these changes are made ...
The Effect Of Inlet Air Temperature On The Efficiency Of A Spark Ignition Engine, John B. Toomey Jr.
The Effect Of Inlet Air Temperature On The Efficiency Of A Spark Ignition Engine, John B. Toomey Jr.
Masters Theses
"The object of this thesis is to determine the effect of inlet air temperature on the efficiency of an internal combustion engine. In most text books the subject is dismissed with mentioning the negative effect of warm air on the maximum output of the engine. This fact is recognized but since most engines are run at maximum output only a small percentage of the time, it would be possible to control the air temperature as the situation demanded. With the assumption that cold air could be used when full power is desired, it was decided to determine the effect of ...
Photoelastic Investigation Of Filleted Corners In Square Apertures In Flat Plates Subjected To Tension, Raymond Huston Bever
Photoelastic Investigation Of Filleted Corners In Square Apertures In Flat Plates Subjected To Tension, Raymond Huston Bever
Masters Theses
"During recent years many advances have been made in solving engineering problems by mathematical means. While this method of solving problems is invaluable to the engineer, there are times when a rigorous mathematical solution cannot be readily obtained, and the engineer must resort to other methods, some of which are approximate.
This paper attempts to show the application of photoelastic investigation to such a problem. The results of this problem are quantitative, but they show without any doubt that this method of investigation has considerably influenced the modern design of machine parts and helped in many cases to improve construction ...
The Effect Of Back Pressure Created By A Venturi Tube On Power Output And Efficiency Of An Internal Combustion Engine, James J. Trace
The Effect Of Back Pressure Created By A Venturi Tube On Power Output And Efficiency Of An Internal Combustion Engine, James J. Trace
Masters Theses
"The exhaust pressure against which an engine works affects the amount of pumping losses, the volumetric efficiency and the rate of advance of the flame front during the combustion process.
When the back pressure is decreased to the same pressure as the intake pressure, the amount of negative work done during the exhaustintake process approaches the positive work done during the process. It can be seen from a PV diagram that it is possible to make this negative work less than the positive work and gain work during the process.
Because of the "15 to 30 degreesâ€ť of intake valve ...
Highway Construction And Maintenance Equipment With Machine And Automotive Repair Shops For The Reconstruction Of The Highways Of The Iv Division, Ankara, Turkey, Steve Theodorides
Highway Construction And Maintenance Equipment With Machine And Automotive Repair Shops For The Reconstruction Of The Highways Of The Iv Division, Ankara, Turkey, Steve Theodorides
Masters Theses
"With the rapid advancements being made in travel and communication facilities today, the world is steadily growing smaller and people in the far places of the world are no longer strangers.
There is no doubting the importance of tractors, dozers, scrapers, power shovels, graders, bituminus construction equipment, aggregate handling, etc., in the presentday world, in aiding the progress of civilization and bringing to all people the good things of life.
It must be remembered that money expended for highways is not wasted, and can be classified as an asset.
In substance, this is a general project for the reconstruction and ...
Temperature Fluctuations Within A Solid Of Finite Thickness, William Sanford Hogan
Temperature Fluctuations Within A Solid Of Finite Thickness, William Sanford Hogan
Masters Theses
"The object of this thesis is to determine by analytical methods the temperatures within a homogeneous plate of finite thickness subjected to a constant temperature on one side and a periodically fluctuating temperature on the opposite side. The heat flow in the other two directions is considered negligible in this problem. Periodic changes of temperature are frequent in nature and in engineering. The surface of the earth is heated periodically by the sun in its daily and annual cycle and the periodic temperature changes below the surface and the question to which depth these changes are appreciable were dealt with ...
Analytical Investigation Of Bending Effects On The Stability Of A Tube Subjected To External Pressure, Charles Young
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 thickwalled 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 submarine 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 ...
A Determination Of The Economic Feasibility Of Producing Marginal Gas Wells, Horace Tharp Mann
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 ...
TorqueStress Relations In Bolts With National Fine Threads, Eugene Casper Chase
TorqueStress Relations In Bolts With National Fine Threads, Eugene Casper Chase
Masters Theses
"Stresses, in bolts, caused by initial tightening have long been a problem to machine designers. To take care of these unknown stresses, produced by initial tightening, designers have used empirical formulas. These formulas originally used for National Coarse Threads, have been carried over into the field of National Fine Threaded bolts. No known tests have been conducted to determine whether or not these formulas hold in the initial tightening of Fine Threaded bolts. Initial tightening stresses may be caused by one of two ways. First, consider two flat ground plates to be held together by bolts to form a steam ...
Periodic Heat Flow In A SemiInfinite Solid, Warren George Heidbrier
Periodic Heat Flow In A SemiInfinite Solid, Warren George Heidbrier
Masters Theses
"The object of this investigation is to determine by analytical means the temperature within a homogeneous semiinfinite 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 semiinfinite 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 ...
Hydraulic Scale For Measurement Of Dynamometer And Other Forces, John Richard Barton
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 Temperature Within A Homogeneous Plate Of Finite Thickness, Charles R. Remington
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 xdirection. 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 ...
The Application Of The Relaxation Method To The Solution Of SteadyState Heat Transfer Through A Concentric Square Insulator, William Edward Simpkin
The Application Of The Relaxation Method To The Solution Of SteadyState 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 insideoutside dimension ratios, in terms of a concentric round insulator of the same insideoutside 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.
Analytical Investigation Of Thin And Moderately ThickWalled Tubing Under Peripheral And Biaxial Loading, Frank Joseph Cizek
Analytical Investigation Of Thin And Moderately ThickWalled Tubing Under Peripheral And Biaxial Loading, Frank Joseph Cizek
Masters Theses
"The problem then, resolves itself into a study of the behavior of thinwalled and moderately thickwalled cylinders under the effects of an external fluid pressure acting alone, or the effects of an external fluid pressure acting simultaneously with an axial loading. In this thesis a theoretical or analytical approach will be used. Some application and reference will be made to oilwell casings in particular, but the solutions will not be restricted to oilwell casing alone. it must be recognized that the tubing problem involves the problem of unstability before the proportional limit of the metal is exceeded and a similar ...
The Application Of The Relaxation Method To The Solution Of Problems Involving The Flow Of Fluids Through Porous Media, Alexander Antoine Zwierzchowski
The Application Of The Relaxation Method To The Solution Of Problems Involving The Flow Of Fluids Through Porous Media, Alexander Antoine Zwierzchowski
Masters Theses
"The purpose of this investigation is to determine the feasibility of applying the relaxation method of mathematical analysis to the solution of problems in rheology. The relaxation method was first introduced by R. V. Southwell who applied it to the problem of electrical conductivity. It was later used by M. W. Emmons to solve twodimensional heat conduction problems. The steadystate flow of fluids through porous media can be difficult or impossible by the usual analytical methods even with rather simple boundary conditions. The relaxation method promises to provide an easier method of solution and to provide a means of solving ...
Torque Characteristics Of High Speed Steel Twist Drills, Tien Chi Lee
Torque Characteristics Of High Speed Steel Twist Drills, Tien Chi Lee
Masters Theses
"The drill is the most efficient tool used by machinists, for in no other tool is the cutting surface as large in proportion to the cross sectional area of the body or part that is its real support. Drills have shared evolutionary developments from carbon steels to high speed steels and from flat to twist drills. Many investigations have been made on the twist drills, but due to the majority of their work being based on the size of drills from 1/2 to 11/2 inches or larger, there is a dearth of published data on the general problem ...
The Effect Of The Convection Coefficient On The Temperature Amplitude In Periodic Heat Flow, Gordon L. Scofield
The Effect Of The Convection Coefficient On The Temperature Amplitude In Periodic Heat Flow, Gordon L. Scofield
Masters Theses
"The problem to be investigated in this thesis is that of periodic heat flow in a semiinfinite solid. Periodic flow means that heat flow is a continuous function of time and repeats itself at regular intervals. A semiinfinite solid is one which is bounded by one and only one plane. This subject has received considerable attention in the field of soil temperatures, both at the surface of the earth and at various depths. The surface of the earth is subjected to temperature changes which are nearly periodic. These temperature changes take place both daily and annually. A knowledge of these ...
Automatic Wheel Balancer For Automobile Wheel, Frederick Eugene Nevin
Automatic Wheel Balancer For Automobile Wheel, Frederick Eugene Nevin
Masters Theses
"Automobiles of today have been so constructed that greater speeds under safer conditions now exist. One of the improvements has been the low pressure tire. These tires carrying less pressure necessitates a casing of greater volume. This has created a tire of greater thickness in the axial direction but at the same time has decreased the diameter. Because of these innovations in presentday tires the author believes the wheel assembly (tire, tube, wheel, and brake drum) should be considered as a rotating cylinder not as a rotating disk. This being the case, the condition of dynamic unbalance is more critical ...
The Application Of The Relaxation Method To The Solution Of Problems Involving The Flow Of Gases Through Porous Media, Ralph Davis
The Application Of The Relaxation Method To The Solution Of Problems Involving The Flow Of Gases Through Porous Media, Ralph Davis
Masters Theses
"The purpose of this investigation is to determine the feasibility of applying the relaxation method of mathematical analysis to the solution of problems involving the flow of gases through porous media. The relaxation method was first applied to twodimensional problems by Christopherson and Southwell, who applied it to problems in stress analysis. It was later applied to steadystate heat conduction problems by H. W. Emmons and to steadystate flow of incompressible liquids by A. A. Zwierschowski. The solutions of problems involving the flow of gases through porous media is difficult for all but the simplest boundary conditions, and impractical for ...
Water Injection In The Modern Automotive Spark Ignition Engine, Leonard Carl Nelson
Water Injection In The Modern Automotive Spark Ignition Engine, Leonard Carl Nelson
Masters Theses
"The injection of water in the spark ignition engine is not new. The effect of humidity in the air on the performance of the spark ignition engine probably initiated the early investigations. The water vapor in the inlet air decreases the speed of the flame front and necessitates spark advance to assure maximum power and maximum efficiency. Water particles in the air evaporate during the compression and combustion of the inducted charge and decrease the tendency of the engine to detonate. These effects are very evident when operating the spark ignition engine in a moist atmosphere. Water is not a ...
Air Cooled Engine Cooling Fins Redesigned By Use Of The Membrane Analogy For Heat Conduction, Eberhard Hammel Miller
Air Cooled Engine Cooling Fins Redesigned By Use Of The Membrane Analogy For Heat Conduction, Eberhard Hammel Miller
Masters Theses
"The purpose of this investigation is to determine the feasibility of applying the twodimensional heat conduction membrane analogy to the redesign of cooling fins of aircooled engines"Preface, page ii.
The Application Of The Membrane Analogy To The Solution Of Heat Conduction Problems, Lloyd Hines Wilson
The Application Of The Membrane Analogy To The Solution Of Heat Conduction Problems, Lloyd Hines Wilson
Masters Theses
"The purpose of this investigation is to determine the feasibility of applying the membrane analogy to the solution of twodimensional heat conduction problems. This investigation will deal only with heat conduction in the steady state through homogeneous media"Preface, page iii.
Investigation Of The StressStrain Of American Standard Or National Course Bolts, Clare Jackson Thorpe
Investigation Of The StressStrain Of American Standard Or National Course Bolts, Clare Jackson Thorpe
Masters Theses
"The purpose of this investigation is to determine, if possible, a formula for the initial tensile load that will consider the Nominal Diameter of the bolt and the yield point of the material from which the bolt is manufactured; to determine, if possible, a torque stress relation, when tightening the bolt"Preface, page iii.
The Analysis Of Cantilever Plates With Concentrated Loads, Constant Roberts Marks
The Analysis Of Cantilever Plates With Concentrated Loads, Constant Roberts Marks
Masters Theses
(From the Introduction)
The problem of a cantilever plate or slab with variable, discontinuous, concentrated, or eccentric loading occurs frequently in engineering design. Examples are substructure walls, piers, projecting floor slabs, and gear teeth. The solution of most of these problems can be made to depend on the analysis of the plate in question loaded with one or more concentrated loads. Such analyses are available for only a few cases of loading, and no practical method is available to the designer for making any kind of a reasonably accurate stress analysis for many cases he may encounter.
In this paper ...