Engineering Commons^™

An Experimental Study Of Temperature Separation In Swirling Flow, Hiromoto Kuroda

Doctoral Dissertations

The objective of the present investigation is to substantiate the mechanism of acoustic streaming; this was carried out by conducting detailed internal surveys of a Ranque-Hilsch swirling flow test rig at the condition when the vortex whistle was attenuated or excited. This control of the vortex whistle was accomplished by two methods.

In the first method where the vortex whistle was attenuated by placing a restriction at the exhaust, a Rankine vortex was observed to form, accompanied by an almost uniform total temperature distribution in the radial direction except for a dip near the vortex core; when the vortex whistle …

Solar Air Heaters For On-Farm Crop Drying: Case Studies, Alvin Ray Womac

Masters Theses

Three types of suspended plate solar air heaters were installed on farms in Tennessee to supply heat for grain and crop drying. A wrap-around solar air heater was constructed on a row crop farm in West Tennessee and used to dry 210 m³ (6000 bu) of corn during Fall 1982 and 105 m³ (3000 bu) of wheat during Spring 1983. Three portable solar air heaters were installed on a row crop farm in Middle Tennessee and used to dry 800 m³ (23000 bu) of soybeans and 120 m³ (3500 bu) of corn during Fall 1982. A …

A Machining System For Turning Nonaxisymmetric Surfaces, Spivey Stevens Douglass

Doctoral Dissertations

Aspheric reflecting surfaces possessing extremely high surface finish and contour accuracy are often demanded by the optics industry. Such reflectors have also been required in high energy gas laser systems used to trigger thermonuclear reactions in experiments connected with advanced electric power generation.

Historically, production of optical pieces of the quality described required many repetitions of selective hand-lapping, polishing and measuring. In the past ten years production of these pieces has been enhanced by machining with diamond cutting tools on precision numerically controlled (NC) turning machines. These machines are capable of generating axisymmetric surfaces competitive in quality to those produced …