Diffusion and decay of turbulent elliptic wakes
| dc.contributor.author | Kuo, Yung-Huang, author | |
| dc.contributor.author | Baldwin, Lionel V., author | |
| dc.contributor.author | Fluid Dynamics and Diffusion Laboratory, College of Engineering, Colorado State University, publisher | |
| dc.date.accessioned | 2019-09-17T15:18:57Z | |
| dc.date.available | 2019-09-17T15:18:57Z | |
| dc.date.issued | 1965-08 | |
| dc.description | CER65YHK-LVB42. | |
| dc.description | CEP66-67LVB-YHK68. | |
| dc.description | August 1965. | |
| dc.description | Includes bibliographical references (page 13). | |
| dc.description | Research Sponsored by the Bureau of Ships Fundamental Hydromechanics Research Program. Administered by the NONR 1610(08). | |
| dc.description.abstract | Three-dimensional, turbulent wakes having elliptical cross-sections were studied both experimentally and analytically for a constant-fluid-property, zero-pressure-gradient flow. An analytical solution for wake diffusion and decay was obtained from a linearized momentum equation by assuming a constant eddy viscosity in the transverse plane but variable along the wake centerline. The experimental data confirmed the prediction that elliptical wakes approach a axisymmetry far downstream. Data were obtained in wakes of 1 inch and 3 inch diameter disks having eccentricities of 1.0, 0.6 and 0.2 over a mean Reynolds number range from 2.4 x 10^4 to 7.1 x 10^4 Mean velocity and turbulent intensity data were gathered between 8 and 266 diameters downstream of the disks. Several arbitrary constants of the analysis were determined so that engineering estimates can be made from the analytical results. Unlike axisymmetric and two-dimensional geometries, elliptic wakes offer an opportunity to test eddy viscosity assumptions in one plane without adjustable factors, and this was done. However, the mean velocity profiles deviated from the predicted Gaussian shape even though approximate similarity was attained far downstream. | |
| dc.format.medium | technical reports | |
| dc.identifier.uri | https://hdl.handle.net/10217/197879 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation | Catalog record number (MMS ID): 991012881309703361 | |
| dc.relation.ispartof | Civil Engineering Reports | |
| dc.relation.ispartof | CER, 65-42 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject.lcsh | Turbulence | |
| dc.subject.lcsh | Wakes (Aerodynamics) | |
| dc.subject.lcsh | Diffusion | |
| dc.title | Diffusion and decay of turbulent elliptic wakes | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). |
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