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Influence of surface roughness and sliding speed on the friction and wear of low density polyethylene
(Virginia Polytechnic Institute and State University, 1978)
The effect of surface roughness and sliding speed on the wear mode of low density polyethylene was studied with multipass experiments at the high sliding speeds by the use of a pin-on-disk wear machine.
Surface roughness ...
Analysis and design of a cylindrical parabolic solar collector
(Virginia Polytechnic Institute and State University, 1978)
A cylindrical-parabolic solar collector was thermally optimized for a winter season using a weather model and an extension of the present state-of-the-art collector theory. An accurate model for the cover transmittance and ...
An experimental study of the wall characteristics of a local fluid constriction plasma generator
(Virginia Polytechnic Institute and State University, 1973)
A local energy conversion efficiency for a confined-discharge plasma generator is defined as the fraction of local power input which is transferred to the gas. The local efficiency is a maximum near the gas inlet and ...
Determination of acoustic ray paths in enclosed spaces
(Virginia Tech, 1975)
Equations were derived to calculate the reflection points of acoustic rays emanating from a source to a receiver. Reflection points for up to three reflections could be determined if the location of the source, receiver ...
Application of ray acoustics to the propagation of sound in ducts containing sheared flows
(Virginia Polytechnic Institute and State University, 1972)
Ray acoustics has been applied to the propagation of sound waves in a homogeneous moving medium with sheared flow bounded by the hard walls of a duct. Differential equations describing the ray trajectories and spreading ...
Feasibility study of hydrostatic transmissions for automobile applications
(Virginia Polytechnic Institute and State University, 1978)
The feasibility of obtaining improved fuel efficiency by incorporating a hydrostatic transmission was investigated. The proposed transmission was composed of positive-displacement axial-piston hydraulic devices. The ...
Development of interactive computer programs for mechanical engineering design: fatigue analysis, section properties, and beam analysis
(Virginia Polytechnic Institute and State University, 1978)
This thesis presents the theory and describes three interactive computer graphics programs for mechanical engineering design: Fatigue Analysis, Section Properties, and Beam Analysis. The Fatigue Analysis program sizes up ...
Testing of the suspended vehicle system scale model
(Virginia Polytechnic Institute and State University, 1973)
A 1/24th scale model of the SVS (Suspended Vehicle System) guideway was constructed, instrumented, and tested. The model simulated five 250-ft-spans of the cable-stayed guideway for high-speed mass transportation type ...
Reduction of energy losses: a key to improved rock drilling?
(Virginia Tech, 1975)