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Author Index, University Of Missouri--Rolla

Symposia on Turbulence in Liquids

No abstract provided.

A Proposed Interpretation Of Transitional And Turbulent Energy Flow Processes, J. N. Cannon, R. W. Hanks

Symposia on Turbulence in Liquids

This paper discusses the consequence of a continuum analysis of turbulence using the Reynolds convention, on the cascade of energy to internal thermal energy. It is observed that there are two distinct dissipative paths or traps that the energy follows, neither of which involves vorticity. It is observed that the so-called "Reynolds' Stresses" are not involved in these irreversible dissipative paths, but are in the reversible bridge between the mean and fluctuating flows.

An effort is made to generate a consistent physical interpretation of all of the terms in the equations used rather than selecting isolated terms for explanation. Some …

The Comparison Of A New Constant Temperature Anemometer With Several Laser Anemometer Configurations, R. L. Humphrey

Symposia on Turbulence in Liquids

This paper covers electronic design advances that have made it possible to adjust the frequency response of a film probe and make it comparable to that of a wire probe. Also, a test setup for the laser anemometer will be presented using the forward scattering technique. Sample data taken in a hydraulic loop will be related to the laser system output. Following the presentation of the anemometer and laser systems, five fluid flow measurement features will be discussed in order to help the experimenter choose the method most suited to his particular application.

The Spectrum Of Light Scattered From Particles Suspended In A Turbulent Fluid, R. V. Edwards, J. C. Angus, R. Maurer, J. W. Dunning

Symposia on Turbulence in Liquids

All Laser Doppler Velocimeter (LDV) measurements are made by scattering light from small particles suspended in the flow. Further, the scattered light is collected from some finite region within the flow -- commonly called the "sample-volume." These two facts comprise the necessary starting point of an analysis of an LDV.

Correlation And Statistical Characteristics Of Turbulence Fronts In The Wakes Of Hypervelocity Bodies, R. H. Howell, J. L. French

Symposia on Turbulence in Liquids

Data on statistical wake turbulence of the far wake of sphere and cone models with velocities from 9,800 to 21,500 feet/second and range pressures from 50 to 120 mm Hg. are presented and analyzed. The measurement technique used is that of observing the turbulence edge position of the wake on schlieren films. The measured parameters are the wake width; edge roughness; auto-correlation function; microscale; e-fold; integral, and average eddy lengths; wake dissipation parameter; Kolmogoroff and energy containing wave number parameters; Lagrangian integral time scale parameter; Strouhal number; cross-correlation function; and wake edge velocity. The results of these measurements are compared …

Visualization Of Unsteady Flow Over Oscillating Airfoils, G. H. Ruiter, H. M. Nagib, A. A. Fejer

Symposia on Turbulence in Liquids

This study is concerned primarily with the complex nature of leading edge flow separation occurring on airfoils oscillating in a uniform flow field at low Reynolds numbers. The flow field past an oscillating airfoil and a fixed airfoil with an oscillating flap were investigated using various visualization techniques in water. The role of mean flow velocity, instantaneous angle of attack, mean angle of attack and amplitude and frequency of oscillation as well as the location of the support point are examined. The results which were obtained over a range of parameters substantially beyond previous studies include new information regarding the …

Turbulence Measurements Using The Laser Doppler Velocimeter, J. W. Dunning, N. S. Berman

Symposia on Turbulence in Liquids

Although the laser Doppler velocimeter has been used for turbulence measurements in the past, no set of measurements in practical turbulent flows has been available to evaluate the instrument. In this work we examine in detail the photomultiplier signal representing the axial velocity of water within a glass pipe. We show that with proper analysis of the photomultiplier signal, the turbulent information that can be obtained in liquid flows is equivalent to recent hot-film studies. In shear flows the signal from the laser Doppler velocimeter contains additional information which may be related to the average shear.

A Critical Survey Of Turbulence In Bearings, E. A. Saibel, N. A. Macken

Symposia on Turbulence in Liquids

The subject of turbulence in bearings is critically surveyed. Both experimental and theoretical investigations are discussed. It is noted that beyond the laminar range, Taylor vortices develop. Some vortex structure exists even up to the highest Reynolds numbers. This suggests that the turbulence in bearings is much different from that which is found in other flows such as pipes or boundary layers. Unfortunately, the theoretical models have been based on mixing length or "law of the wall" information. A call is made for experimental information to formulate new theory applicable to bearings.

Tests On Puddle And Fillet Weld Connections, A. K. Dhalla, Teoman Peköz

CCFSS Library (1939 - present)

INTRODUCTION The purpose of the present investigation has been to study the behavior of symmetrically welded connections having different weld configurations. As shown in Fig. la, the specimens were fabricated by butting two plates (CP) which were connected by welding cover plates AB and CD on two sides of CP. The fabricator supplied different types of welded connection specimens, sketched in Figs. la to If. A total of 115 specimens were tested in tension under monotonically increasing static load. Basic variables considered in the design were: (a) thickness and the shape of the cover plates, and (b) weld size and …

Grooving Pavement Centerlines For Lane Demarcation, William M. Seymour

Kentucky Transportation Center Research Report

In late June 1969, the Kentucky Department of Highways contracted to have experimental, longitudinal centerline grooves, 15 feet long at 80-foot intervals, cut into both sets of dual lanes of a 2.7-mile portion of I 71 in Carroll County. When the centerline was painted in an otherwise normal way, the skip lines were alternately on grooved and ungrooved surfaces. The roadway was opened to traffic on July 15, 1969. An interim performance report contained detailed information on the test site, grooving procedures, groove configuration, initial striping efforts, and preliminary evaluations of the relative effectiveness of the grooved stripe. The purposes …

Operational Characteristics Of Lane Drops, Don L. Cornette

Kentucky Transportation Center Research Report

A lane drop is defined as a location on a highway where the number of lanes provided for through traffic decreases. For purposes of this study, the broad category of lane drops has been further subdivided into three specific classes: lane exits, lane splits, and lane terminations. These subdivisions are illustrated schematically in Figure 1. A lane exit refers to a location where the number of through lanes decreases at an interchange on a multilane roadway. A designation of lane split denotes a major fork of a multilane highway where the level of traffic service provided at the terminus of …

Measurement Of Currents In Lake Mead With The Deep Water Isotopic Current Analyzer (Dwica), J. J. Sartoris, D. A. Hoffman, Bureau Of Reclamation

Publications (WR)

In Nov 1967, a Deep Water Isotopic Current Analyzer (DWICA) was used to study current patterns in the Boulder Basin of Lake Mead to determine if low-quality water from Las Vegas Bay might enter the Southern Nevada Water Project intake on Saddle Island. Secondary objectives were to study the general current patterns in Boulder Basin and the effect of power discharges at Hoover Dam on these currents. Results of current measurements at 3 stations in Boulder Basin are given. Observations indicate a definite possibility that low-quality water from Las Vegas Bay might enter the water intake on Saddle Island. Current …

On Target, Tim Brady

Publications

An examination of aircraft accidents in the military while training for weapons delivery maneuvers.

The Oxidation Of Carbon Monoxide By Magnesium Aluminate, James A. Whelan

Dissertations

In this research the catalytic oxidation of carbon monoxide was investigated on magnesium aluminate catalysts, MgO:xAl₂O₃, with five different compositions, x, ranging from 1.0 to 3.0. The reaction was run at temperatures ranging from 500 to 600 °C. with radioactive carbon monoxide as the tracer. An experimental technique has been devised for the analysis of unreacted CO which takes into account a correction for the solubility of CO in CO₂.

Four mathematical models were postulated to explain the mechanism of reaction. The models were examined against experimental data by means of non-linear least squares …

A Simple Method For Liquid Enthalpy Departure Calculations, Ching-Lin Chien

Theses

The reduced equation of state for gases and liquids developed by Benson and Golding in 1951 is modified and used to calculate liquid enthalpy departures for saturated pure substances and mixtures. The temperature-independent coefficients in the modified equation are determined from critical properties and experimental liquid enthalpies at the boiling point and at the critical point. The results of the proposed method are compared with those predicted with the modified Redlich-Kwong equation of state by Joffe and Zudkevitch.

Dynamic And Thermal Studies Of Micron Size Metallic Particles In A Nonequilibrium Low Pressure Argon Plasma Jet, Barry R. Maxwell

Mechanical Engineering ETDs

Dynamic And Thermal Studies Of Micron Size Metallic Particles In A Nonequilibrium Low Pressure Argon Plasma Jet

A Time Domain Deconvulution Technique For The Correction Of Transient Measurements., Larry Wayne Bickle

Mechanical Engineering ETDs

Techniques for correcting transient measurements can be considered as "deconvolving" or solving the convolution integral equation

R(t)=F(0) * C(t) + ∫t_0 C(t- Τ) [dF(T)/dT] dT

for the input, F(t), given the response, R(t), and response of the measurement system to a step input of unit magnitude, C(t). Because the deconvolution process is mathematically ill conditioned, it is usually necessary to place additional constraints on the functions F(t), C(t) and/or R(t).

In this paper, a numerical time domain deconvolution

(TDD) technique that provides physical insight into the problems of correcting transient measurements is presented and compared to techniques that have previously …

The Analysis And Behavior Of Thin-Steel Hyperbolic Paraboloid Shells, Peter Gergely, P. V. Banavalkar, J. E. Parker

CCFSS Library (1939 - present)

An extensive experimental and analytical investigation of thin-steel hyperbolic paraboloid (hypar) structures was carried out to provide design information. As a result of this work, empirical data is provided regarding the behavior of such structures and computer programs are presented for the analysis of thin steel hypar structures. Hyperbolic paraboloid structures possess a unique combination of structural and architectural properties; some of them are the following: 1) Due to the double curvature of the surface the internal stresses in the deck are generally low and the deflections are small. 2) Since a hypar surface can be generated by straight lines, …

Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota

Civil and Environmental Engineering

A nationwide survey of air pollution control training efforts in the United States at colleges and universities was carried out for the S-ll Education and Training Committee, Air Pollution Control Association. Information from 91 schools having four year or graduate programs and five community colleges was received. Questions include type of course work, backgrounds of participating faculty and students, and eventual placement. At the present time about 70% of those in training are graduate students. It was found that most students taking initial employment in air pollution control activities had the M.S. degree. Recommendations for updating this information are made.

Aggregate Shape And Skid Resistance, Jerry G. Rose

Kentucky Transportation Center Research Report

This report concerns further efforts toward the measurement and analysis of the relative influence of aggregate shape on pavement skid resistance. A simple test method for determining aggregate shape in a meaningful way with respect to skid resistance is included. Proposed specifications for skid-resistant, sand-asphalt surface and skid-resistant, Class I, Type A, Modified, bituminous concrete surface containing lightweight aggregate are introduced.

Experimental Guardrail Installation, R. L. Musgraves, Gordon R. Garner

Kentucky Transportation Center Research Report

This is the final report on a limited investigation comparing the performance of painted steel, galvanized steel and aluminum guardrails. A previous report was issued in 1964. The final inspection of the project was made in November 1969.

The project consisted of approximately 2500 lineal feet of each type of guardrail (see Figure 1 and Table 1). The painted steel and galvanized steel were installed in November 1962. The aluminum guardrails were installed in February 1963. All rails are the deep-beam type and were installed in accordance with special provisions which covered material requirements and erection procedures. The special provisions …

Midair! Midair!, Tim Brady

Publications

A review of a midair collision involving a civilian aircraft and a military aircraft. Careful adherence to the see and avoid principle is advised for all aircraft.

Analysis Of Water Reuse Alternatives In An Integrated Urban And Agricultural Area, A. Bruce Bishop, David W. Hendricks

Reports

Intoduction

The growing demands on our existing water supplies and the current problems of water shortage emphasize the need for a comprehensive approach to analysis and planning of water reuse. The primary focus, heretofore, has been on the treatment technology for achieving water reuse.

The concept of reuse, however, should be broadened to consider a totally integrated urban and agricultural system. This necessitates a systems analysis where water reuse, together with all other water dispositions, is considered in the context of its contribution to the total water resources pool of a region.

The components of the water resource system are …

Agitation Of Dilatant Fluids, Vijay Jang Datta

Theses

No abstract provided.

Combined Thermal Weakening And Mechanical Disintegration Of Hard Rock, George Bromley Clark, T. F. Lehnhoff, Gary F. Fenton, M. R. Patel, Jaw K. Wang, Vernon Dale Allen

Mining Engineering Faculty Research & Creative Works

This investigation of the combined effects of thermal weakening and mechanical disintegration (thermomechanical fragmentation) was initiated with a view toward better understanding of the processes required for more rapidly and economically fragmenting or excavating hard rock. Boring machines for utility tunnels, transportation tunnels or mining operations may be able to utilize the advantages of processes such as thermomechanical fragmentation. Secondary fragmentation or rock crushing processes also can conceivably employ the data obtained from this study.

Crictical Shear Loading Of Curved Panels Of Corrugated Sheets With Restrained Edges, George Abdel-Sayed

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Behavior Of Cold Rolled Stainless Steel Members, S. T. Wang, S. J. Errera

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Z-And C-Purlins Connected With Corrugated Steel Sheeting, Paul Wikstrom

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Cold-Formed Folded Plate Structures, Wilbur C. Schoeller, Richard H. J. Pian, Harry R. Lundgren

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Strength And Stiffness Of Steel Deck Shear Diaphragms, Duane S. Ellifritt, Larry D. Luttrell

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.