Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)


Mechanical Engineering


Turbulent fluctuations to some degree are always present in air flow. These turbulent fluctuations are encountered in the wakes of objects in flight such as aircraft, airfoils, missiles and moving automobiles. To begin with, manty people use the word turbulence in a very general manner, to describe either a very simple unsteady motion or a very complicated vortex motion. Turbulence may be classified as either isotropic or non-isotropic. One of the best experimental techniques for studying turbulent flow involves the use of the hot-wire anemometer. Another device used for turbulence studies is the Mach Zhender interferometer. This device uses light interference fringes as a measure of the density variation pattern in the turbulent flow field. Measurements of turbulence are usually evaluated by statistical correlation methods or used to check out phenomenological theories. For statistical evaluation, two viewpoints are used; the Lagrangian, and the Eulerian. There is considerable difference between the theoretical model and the experimental system on the study of turbulence. Turbulent flows can be termed free if they are not confined by solid walls. The author has a two fold objective to be accomplished by this thesis. The first is to design and construct a research facility for studying different gas dynamics phenomena. The second aspect of the objective is to do a theoretical analysis of the phenomenon known as half-jet turbulent mixing. This investigation is of course contingent upon the satisfactory performance of the research facility.

Library of Congress Subject Headings

Air flow
Atmospheric turbulence


Includes bibliographical references



Number of Pages



South Dakota State University