Development of a Four-Fin Bio-Inspired UUV: CFD Studies
The development of an unmanned underwater vehicle (UUV) with four actively controlled curvature flapping fins is described. Three dimensional unsteady flow computations past several configurations of the vehicle are computed and based on the minimum drag a nearly elliptical cross-section with a smoo...
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| creator | Ramamurti, Ravi Geder, Jason D |
| description | The development of an unmanned underwater vehicle (UUV) with four actively controlled curvature flapping fins is described. Three dimensional unsteady flow computations past several configurations of the vehicle are computed and based on the minimum drag a nearly elliptical cross-section with a smooth leading and trailing sections was obtained. The hydrodynamic characteristics of this vehicle at NRL are computed for a range of operational conditions and a dynamic mode of this vehicle was created for the development of a controller. Detailed parametric studies were carried out varying several physical and kinematic parameters, such as separation of the two fins, the phasing of the rear fin with respect to the front fin, the vehicle speed, and the fin orientation. The unsteady flow solver is coupled to a 6-DOF model to simulate an unconstrained yaw and dive maneuvers of the vehicle.
The original document contains color images. |
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The original document contains color images.</description><language>eng</language><subject>ANGLE OF ATTACK ; AXIAL SEPARATION ; COMPUTATIONAL FLUID DYNAMICS ; DIVING ; DRAG ; FINS ; FLAPPING FINS ; FLAPPING SURFACE DEFORMATION ; Fluid Mechanics ; HYDRODYNAMIC CHARACTERISTICS ; INCOMPRESSIBLE FLOW ; LEADING EDGES ; LIFT ; LOW VELOCITY ; MANEUVERABILITY ; Marine Engineering ; ORIENTATION(DIRECTION) ; SELF OPERATION ; SIDE SLIP ANGLE ; SIMULATION ; THRUST ; TRAILING EDGES ; UNDERWATER VEHICLES ; UNMANNED ; UNSTEADY FLOW ; UNSTRUCTURED GRIDS ; WU64-660202 ; YAW</subject><creationdate>2012</creationdate><rights>Approved for public release; distribution is unlimited.</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,780,885,27567,27568</link.rule.ids><linktorsrc>$$Uhttps://apps.dtic.mil/sti/citations/ADA569188$$EView_record_in_DTIC$$FView_record_in_$$GDTIC$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Ramamurti, Ravi</creatorcontrib><creatorcontrib>Geder, Jason D</creatorcontrib><creatorcontrib>NAVAL RESEARCH LAB WASHINGTON DC LAB FOR COMPUTATIONAL PHYSICS AND FLUID DYNAMICS</creatorcontrib><title>Development of a Four-Fin Bio-Inspired UUV: CFD Studies</title><description>The development of an unmanned underwater vehicle (UUV) with four actively controlled curvature flapping fins is described. Three dimensional unsteady flow computations past several configurations of the vehicle are computed and based on the minimum drag a nearly elliptical cross-section with a smooth leading and trailing sections was obtained. The hydrodynamic characteristics of this vehicle at NRL are computed for a range of operational conditions and a dynamic mode of this vehicle was created for the development of a controller. Detailed parametric studies were carried out varying several physical and kinematic parameters, such as separation of the two fins, the phasing of the rear fin with respect to the front fin, the vehicle speed, and the fin orientation. The unsteady flow solver is coupled to a 6-DOF model to simulate an unconstrained yaw and dive maneuvers of the vehicle.
The original document contains color images.</description><subject>ANGLE OF ATTACK</subject><subject>AXIAL SEPARATION</subject><subject>COMPUTATIONAL FLUID DYNAMICS</subject><subject>DIVING</subject><subject>DRAG</subject><subject>FINS</subject><subject>FLAPPING FINS</subject><subject>FLAPPING SURFACE DEFORMATION</subject><subject>Fluid Mechanics</subject><subject>HYDRODYNAMIC CHARACTERISTICS</subject><subject>INCOMPRESSIBLE FLOW</subject><subject>LEADING EDGES</subject><subject>LIFT</subject><subject>LOW VELOCITY</subject><subject>MANEUVERABILITY</subject><subject>Marine Engineering</subject><subject>ORIENTATION(DIRECTION)</subject><subject>SELF OPERATION</subject><subject>SIDE SLIP ANGLE</subject><subject>SIMULATION</subject><subject>THRUST</subject><subject>TRAILING EDGES</subject><subject>UNDERWATER VEHICLES</subject><subject>UNMANNED</subject><subject>UNSTEADY FLOW</subject><subject>UNSTRUCTURED GRIDS</subject><subject>WU64-660202</subject><subject>YAW</subject><fulltext>true</fulltext><rsrctype>report</rsrctype><creationdate>2012</creationdate><recordtype>report</recordtype><sourceid>1RU</sourceid><recordid>eNrjZDB3SS1LzckvyE3NK1HIT1NIVHDLLy3SdcvMU3DKzNf1zCsuyCxKTVEIDQ2zUnB2c1EILilNyUwt5mFgTUvMKU7lhdLcDDJuriHOHropJZnJ8cUlmXmpJfGOLo6mZpaGFhbGBKQBVW4pUA</recordid><startdate>20120904</startdate><enddate>20120904</enddate><creator>Ramamurti, Ravi</creator><creator>Geder, Jason D</creator><scope>1RU</scope><scope>BHM</scope></search><sort><creationdate>20120904</creationdate><title>Development of a Four-Fin Bio-Inspired UUV: CFD Studies</title><author>Ramamurti, Ravi ; Geder, Jason D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-dtic_stinet_ADA5691883</frbrgroupid><rsrctype>reports</rsrctype><prefilter>reports</prefilter><language>eng</language><creationdate>2012</creationdate><topic>ANGLE OF ATTACK</topic><topic>AXIAL SEPARATION</topic><topic>COMPUTATIONAL FLUID DYNAMICS</topic><topic>DIVING</topic><topic>DRAG</topic><topic>FINS</topic><topic>FLAPPING FINS</topic><topic>FLAPPING SURFACE DEFORMATION</topic><topic>Fluid Mechanics</topic><topic>HYDRODYNAMIC CHARACTERISTICS</topic><topic>INCOMPRESSIBLE FLOW</topic><topic>LEADING EDGES</topic><topic>LIFT</topic><topic>LOW VELOCITY</topic><topic>MANEUVERABILITY</topic><topic>Marine Engineering</topic><topic>ORIENTATION(DIRECTION)</topic><topic>SELF OPERATION</topic><topic>SIDE SLIP ANGLE</topic><topic>SIMULATION</topic><topic>THRUST</topic><topic>TRAILING EDGES</topic><topic>UNDERWATER VEHICLES</topic><topic>UNMANNED</topic><topic>UNSTEADY FLOW</topic><topic>UNSTRUCTURED GRIDS</topic><topic>WU64-660202</topic><topic>YAW</topic><toplevel>online_resources</toplevel><creatorcontrib>Ramamurti, Ravi</creatorcontrib><creatorcontrib>Geder, Jason D</creatorcontrib><creatorcontrib>NAVAL RESEARCH LAB WASHINGTON DC LAB FOR COMPUTATIONAL PHYSICS AND FLUID DYNAMICS</creatorcontrib><collection>DTIC Technical Reports</collection><collection>DTIC STINET</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Ramamurti, Ravi</au><au>Geder, Jason D</au><aucorp>NAVAL RESEARCH LAB WASHINGTON DC LAB FOR COMPUTATIONAL PHYSICS AND FLUID DYNAMICS</aucorp><format>book</format><genre>unknown</genre><ristype>RPRT</ristype><btitle>Development of a Four-Fin Bio-Inspired UUV: CFD Studies</btitle><date>2012-09-04</date><risdate>2012</risdate><abstract>The development of an unmanned underwater vehicle (UUV) with four actively controlled curvature flapping fins is described. Three dimensional unsteady flow computations past several configurations of the vehicle are computed and based on the minimum drag a nearly elliptical cross-section with a smooth leading and trailing sections was obtained. The hydrodynamic characteristics of this vehicle at NRL are computed for a range of operational conditions and a dynamic mode of this vehicle was created for the development of a controller. Detailed parametric studies were carried out varying several physical and kinematic parameters, such as separation of the two fins, the phasing of the rear fin with respect to the front fin, the vehicle speed, and the fin orientation. The unsteady flow solver is coupled to a 6-DOF model to simulate an unconstrained yaw and dive maneuvers of the vehicle.
The original document contains color images.</abstract><oa>free_for_read</oa></addata></record> |
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| source | DTIC Technical Reports |
| subjects | ANGLE OF ATTACK AXIAL SEPARATION COMPUTATIONAL FLUID DYNAMICS DIVING DRAG FINS FLAPPING FINS FLAPPING SURFACE DEFORMATION Fluid Mechanics HYDRODYNAMIC CHARACTERISTICS INCOMPRESSIBLE FLOW LEADING EDGES LIFT LOW VELOCITY MANEUVERABILITY Marine Engineering ORIENTATION(DIRECTION) SELF OPERATION SIDE SLIP ANGLE SIMULATION THRUST TRAILING EDGES UNDERWATER VEHICLES UNMANNED UNSTEADY FLOW UNSTRUCTURED GRIDS WU64-660202 YAW |
| title | Development of a Four-Fin Bio-Inspired UUV: CFD Studies |
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