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Now showing items 1-10 of 28
Economic comparison of the constant and variable speed motor-driven boiler feed pumps in today's steam electric power station
(Virginia Polytechnic Institute, 1963)
Owing to the continued increase in kilowatt capacity of new power stations being built today, proper sizing and selection of mechanical equipment has a vital effect on dollar savings, both for operation and maintenance ...
An investigation of the effect of entrained oil on the heat transfer rate of a refrigerant evaporator
(Virginia Polytechnic Institute, 1964)
The investigation is concerned with the effect of entrained oil on the heat transfer characteristics of a direct expansion evaporator coil. A modified refrigeration system, in which the oil content of the refrigerant could ...
A photographic investigation of the collision, reaction, and ignition of hypergol droplets
(Virginia Polytechnic Institute, 1965)
The experimental apparatus employed in this investigation permitted a fuel droplet and an oxidizer droplet to collide in a nitrogen atmosphere at temperatures from 50°C to 430°C. The resulting phenomena were photographed ...
A study of velocity profile models and wall shear stress for two and three-dimensional turbulent boundary layer flows
(Virginia Polytechnic Institute, 1968)
A review of the existing, more prominent velocity profile models for two and three-dimensional incompressible flows was presented, with emphasis placed on those that had previously shown their ability to correlate experimental ...
Experimental Evaluation of the Rate of Rise Technique for Measuring Outgassing Rates in a Vacuum
(Virginia Polytechnic Institute, 1967)
With an increase of interest in space flight and vacuum research, there has been a corresponding increase in the need for values of outgassing rates of many materials. In space flight the knowledge of the outgassing rates ...
Forced convection heat transfer from extended surfaces with finned pins
(Virginia Tech, 1965-09-05)
It has been shown that by increasing the film coefficient "h" by means of forced convection the heat transfer rate of a finned pin can be considerably improved. For an average flow rate of air over the extended surfaces, ...
Selection of a noncondensing, single automatic extraction turbo-generator for the Virginia Polytechnic Institute heating and power plant
(Virginia Tech, 1960-02-15)
The results, based on steam demand during the 1961-1962 to 1980-1981 heating seasons, indicate the following returns on each investment for the various turbo-generators operating with steam inlet conditions of 600 psig, ...
An approximate method of calculating the weight of the two- insulation-two-coolant thermal protection system
(Virginia Tech, 1965-05-05)
see document
Analysis of spur gear teeth for static deflections
(Virginia Tech, 1966-03-17)
The problem of the deflection of spur gear teeth has been previously investigated analytically by several authors. Two of the papers dealing with this topic were written by Timoshenko and Baud (18)t and Marin and Shenk ...
Development of a pneumatic sensor for measuring the torque of instrument ball bearings
(Virginia Polytechnic Institute, 1968)
Of the studies that have been conducted on the operational characteristics of instrument ball bearings, a great majority have been in accordance with MIL-STD-206. Since tests in compliance with this specification determine ...