DRAG COEFFICIENT STUDY OF TWO WALL-MOUNTED OBSTACLES
dc.contributor.advisor | Oran, Elaine S | en_US |
dc.contributor.author | Ramekar, Ana | en_US |
dc.contributor.department | Aerospace Engineering | en_US |
dc.contributor.publisher | Digital Repository at the University of Maryland | en_US |
dc.contributor.publisher | University of Maryland (College Park, Md.) | en_US |
dc.date.accessioned | 2018-09-06T05:30:46Z | |
dc.date.available | 2018-09-06T05:30:46Z | |
dc.date.issued | 2018 | en_US |
dc.description.abstract | In order to support various intelligence, surveillance, reconnaissance (ISR) missions, aircraft often undergo structural changes that affect the aircraft’s aerodynamics. A computational fluid dynamics (CFD) study was performed to understand changes to the drag coefficient when two wall-mounted obstacles, representative of common ISR modifications, are positioned in a tandem configuration and exposed to fully subsonic flow. The size, shape and position of the two obstacles is varied. The CFD study used three-dimensional, steady-state, compressible, Reynolds Averaged Navier Stokes equations. The study reported four major results. First, interference effects increase the drag of the trailing obstacle up to 45% and decreases the drag of the leading obstacle up to 27%. Second, the interference effects on both obstacles produces a 12% reduction in drag for low Mach number and a 37% increase in drag for higher Mach numbers. Third, trailing obstacles of large size help reduce the drag of the leading obstacle of a smaller size. Lastly, the region where interference effects occur becomes smaller if the fineness ratio of the trailing obstacle increases. | en_US |
dc.identifier | https://doi.org/10.13016/M2CF9J970 | |
dc.identifier.uri | http://hdl.handle.net/1903/21111 | |
dc.language.iso | en | en_US |
dc.subject.pqcontrolled | Aerospace engineering | en_US |
dc.title | DRAG COEFFICIENT STUDY OF TWO WALL-MOUNTED OBSTACLES | en_US |
dc.type | Thesis | en_US |
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