Analysis of the wake behind a propeller using the finite element method with a two-equation turbulence model
| dc.contributor.author | Kim, Seung J. | en |
| dc.contributor.committeechair | Kaplan, Paul | en |
| dc.contributor.committeemember | Schetz, Joseph A. | en |
| dc.contributor.committeemember | Grossman, Bernard | en |
| dc.contributor.committeemember | Reddy, Junuthula N. | en |
| dc.contributor.committeemember | Neu, Wayne | en |
| dc.contributor.department | Aerospace Engineering | en |
| dc.date.accessioned | 2015-06-24T13:35:11Z | en |
| dc.date.available | 2015-06-24T13:35:11Z | en |
| dc.date.issued | 1988 | en |
| dc.description.abstract | The finite element method in the form of the weak Galerkin formulation with the penalty function method was applied to several problems of axisymmetric turbulent flows including flow through a sudden pipe expansion, the stern region flow of a slender body, and flows past ducted and nonducted propellers in action. The coupled set of the Reynolds time-averaged Navier-Stokes equations and two turbulence transport equations for the turbulent kinetic energy and its rate of dissipation was solved by L/U decomposition and successive substitution with relaxation. An existing finite element code was modified with a low Reynolds number form for an appropriate treatment of wall influences on turbulence transport, which produces a better solution and provides an easier imposition of boundary conditions by solving up to wall with no slip boundary conditions. The two-equation turbulence model with the wall modification was first successfully tested by solving the turbulent flow through a sudden pipe expansion. The numerical simulation of the stern region flow of a streamlined body resulted in an excellent agreement with the measured data in terms of the mean-flow and turbulence quantities. Turbulent shear flows past a propeller at the rear end of the same slender body, modeled by an actuator disk, were successfully solved at two rotational speeds, self-propelled and 100% over-thrusted, using the same two-equation model. And finally, comparisons of the wake behind a propeller were made for the self-propelled conditions of a ducted and nonducted propeller on the same streamlined body. | en |
| dc.description.degree | Ph. D. | en |
| dc.format.extent | xiv, 203 leaves | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.uri | http://hdl.handle.net/10919/53553 | en |
| dc.language.iso | en_US | en |
| dc.publisher | Virginia Polytechnic Institute and State University | en |
| dc.relation.isformatof | OCLC# 18759528 | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject.lcc | LD5655.V856 1988.K557 | en |
| dc.subject.lcsh | Finite element method | en |
| dc.subject.lcsh | Propellers | en |
| dc.title | Analysis of the wake behind a propeller using the finite element method with a two-equation turbulence model | en |
| dc.type | Dissertation | en |
| dc.type.dcmitype | Text | en |
| thesis.degree.discipline | Aerospace Engineering | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | doctoral | en |
| thesis.degree.name | Ph. D. | en |
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