Masters Theses

Keywords and Phrases

Control systems-Design and construction


"A low velocity (0 - 11m/sec), low turbulence vertical atmospheric wind tunnel has been designed and built by Inca Engineering Company of San Gabriel, California. This tunnel was assembled in the Cloud Physics Research Center at UMR. The tunnel is designed to aid in the study of phenomena associated with water drops suspended in a vertical air stream. This thesis describes the design and construction of the velocity control system for this tunnel. Constant speed, centrifugal fans are used to draw air through the tunnel. To allow these fans to operate at a constant efficiency, a valve system is used to provide a constant flow rate to the fans, while controlling the flow rate drawn through the tunnel. This system consists of a valve box with two inlets, one drawing air through the tunnel and the other drawing air from the room, and a sliding carriage, or pintle, with parabolic ends. The pintle is used to vary the areas of each inlet, but maintain a constant total inlet area. The valve system also includes equipment to change the pintle position, thus changing the areas of each inlet, and equipment to give an indication of the pintle position. Preliminary testing of the wind tunnel and velocity control equipment included a determination of the relationship between tunnel test section velocity and pintle position, a determination of velocity profiles in the test section, and a determination of the level of turbulence intensity in the test section"--Abstract, page ii.


Oetting, R. B.

Committee Member(s)

Lee, S. C.
Davis, Robert L.


Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering


University of Missouri--Rolla

Publication Date



v, 48 pages

Note about bibliography

Includes bibliographical references (pages 72-74)


© 1970 Lawrence Vehslage Field, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Wind tunnels -- Design and construction
Turbomachines -- Aerodynamics
Turbulence -- Testing

Thesis Number

T 2466

Print OCLC #


Electronic OCLC #