Thesis (M. Eng.)--Carleton University, 1993. / Also available in electronic format on the Internet.

Thesis (Ph. D.)--University of Hawaii, 1997. / Includes bibliographical references (leaves 184-190).

Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 122-126).

No description available.

"The study was restricted to cyclones which appeared over Europe for at least two consecutive days during 1950"--Page v. The statistical relationships between five parameters which may be used to represent an atmospheric vortex are studied. These parameters are: the central height, ?h, the space change of height, ?h, a size factor, D, the mean gradient, h, and the "gradient-area index", I. The primary purpose of the study is to determine the relationship between the central height and each of the other parameters. The study was restricted to cyclones which appeared over Europe for at least two consecutive days during 1950. All measurements were made on the 500-mb chart. Each parameter was evaluated for 263 cyclones and the 24-hr change of each parameter was computed for 208 cyclones. The methods used to evaluate each parameter are discussed. For each pair of parameters, linear correlation coefficients were computed from grouped data. / "A Paper." / Typescript. / "Submitted to the Graduate Council of Florida State University in partial fulfillment of the requirements for the degree of Master of Science." / Advisor: Thomas A. Gleeson, Professor Directing Paper. / Author's name handwritten on cover: Robert B. DesJardins. / Includes bibliographical references.

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1969. / Vita. / Bibliography: leaves 56-57. / by Albert W. Green, Jr. / Ph.D.

An experimental investigation was carried out of the flow over a hemisphere-cylinder at angles of attack (α = 0° to 90°, Visualizations of skin-friction lines were conducted and were focused mainly on the development of the laminar separation bubble as a function of angle of attack, the conditions under which open and closed separation exist and the interaction between the separation bubble and the leeward vortices. A digital processing method was developed to convert flow visualizations to numerical data. Static pressure measurements over a large range of Reynolds numbers were obtained for two models with different sizes and the same length-to-diameter ratios. Detailed velocity fields, mapped out by a seven hole probe and a laser-Doppler velocimeter (LDV) probe, were carefully examined to provide information on the development of vortical structures on the surface of the model. Comparisons were made of the results obtained using these two instruments. The flowfield in the wake of the hemispherecylinder was also examined at an angle of attack α = 30°. A small bead was strategically placed near the nose to force vortex asymmetry. Difference sizes of bead were also tested to investigate the effectiveness on the asymmetric pattern. Hot-wire anemometers and a dynamic signal analyzer were employed to study the unsteady motion of leeward vortices. / Ph. D.

Ph. D.

A rapid-response thin-film heat flux sensor was used to measure time-resolved unsteady heat flux in a complex junction vortex flow. This sensor, called the Heat Flux Microsensor, was used with a hot-wire anemometer to make simultaneous measurements of velocity and surface heat flux. The results were used to detect the relationship between the surface heat flux and the velocity unsteadiness. The study of this three-dimensional vortex system through time-resolved heat flux measurements is unique; as far as the author is aware, no previously published work has demonstrated the correlation between flow unsteadiness and its effects on the heat transfer for this phenomenon. The heat flux unsteadiness indicative of this vortex flow is discussed as turbulence coefficients and is calculated from both time-resolved and frequency measurements. Turbulence levels as high as 30% were recorded from the time-resolved data and were substantiated by the averaged power spectrum data. The development of the vortex system itself causes three times the heat transfer of the undisturbed boundary layer. / Master of Science

This thesis presents measurements of the three-dimensional flow due to the horseshoe vortex formed at the junction of a flat wall and the leading edge of a Rankine half body. The half body is located between the parallel end walls of a duct to model the situation in turbomachinery where struts and vanes, which generate performance losses due to horseshoe vortices and other secondary flow mechanisms, extend over the total flow passage height. The boundary layer on the duct end wall is artificially thickened to produce a large horseshoe vortex. Flow measurements are presented showing the inlet flow and the three-dimensional flow just downstream of the leading edge of the body. Sufficient data is presented to provide a means for testing the validity of three-dimensional viscous flow calculations. A three-dimensional flow measurement technique using a single slanted hotwire anemometer is evaluated. The hotwire anemometer measurements are compared with measurements of the same flow made with a five-hole pressure probe. A two-dimensional laminar and turbulent boundary layer analysis is performed at mid-height on the body. / M.S.