Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)


Mechanical Engineering


Turbulent mixing of air, gases of different densities, and gases of different kinds are of fundamental importance to scientists and mathematicians, and are of practical importance to engineers. Turbulence as it occurs in nature is of mysterious nature, and there are insurmountable difficulties in completely analyzing the mechanism by which it is produced. Recently with the availability of hot-wire anemometer on a commercial basis, we have been able to investigate turbulence phenomena that previously were confined to more specialized research centers. When parallel streams of air, divided by a flat plate, are allowed to mix, the mixing boundaries are extensions of the boundary layer initially developed upstream of the mixing zone. The purpose of this study was to study experimentally, the mean velocity distribution, the intensity of turbulence, and the temperature distribution in the mixing zone of two turbulent parallel streams of air. A hot wire anemometer and a random signal voltmeter were used to measure the mean velocity and the intensity of turbulence, A copper-constantan thermocouple was used to measure temperature. A special subsonic wind tunnel was already available for this project, and only required a few design modifications to make it suitable for this project.

Library of Congress Subject Headings



Includes bibliographical references



Number of Pages



South Dakota State University