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Please use this identifier to cite or link to this item: http://dspace.dsto.defence.gov.au/dspace/handle/dsto/10521

Title: Phase II Experimental Testing of a Generic Submarine Model in the DSTO Low Speed Tunnel.
Report number: DSTO-TN-1274
AR number: AR-015-873
Classification: Unclassified
Report type: Technical Note
Authors: Quick, H.
Woodyatt, B.
Issue Date: 2014-03
Division: Aerospace Division
Abbreviation: AD
Release authority: Chief, Aerospace Division
Task sponsor: DSTO
Task number: 07/299
File number: -
Pages or format: 29
References: 6
DSTORL/DEFTEST terms: Submarine hulls
Wind tunnel tests
Aerodynamic loads
Abstract: DSTO has completed the second phase of an experimental test program on a sub-scale model of a generic submarine in its low-speed wind tunnel. These tests were used to gather gross steady-state aerodynamic force and moment data for the model in various configurations, where different appendages including a hull-casing, a fin, and control surfaces were incrementally added to the bare-hull form. The effectiveness of the control surfaces to induce pitch and yaw motions was also investigated.
Executive summary: Defence Science and Technology Organisation (DSTO) researchers are undertaking a comprehensive study of the flow characteristics around modern submarine geometries to enhance their knowledge and understanding of these complex flow phenomena. Conducted under the auspices of the DSTO Corporate Enabling Research Programme (CERP) - Future Undersea Warfare, the research involves the use of high-fidelity computational fluid dynamic (CFD) methods, as well as extensive experimental hydrodynamic and aerodynamic testing of a generic shape that is representative of a modern diesel-electric powered submarine.
A sub-scale model of a generic submarine has been tested in the DSTO low-speed wind. The model, as tested, was a 1.35 m long aluminium representation of a submarine, and included a number of detachable appendages, namely a hull-casing, a fin, and four moveable control surfaces. These tests, designated phase II, follow on from previous wind tunnel testing of the same model in bare-hull configuration, now focus specifically on the measurement of gross steady-state forces and moments as various appendages were fitted to the model. The aims of the experiment were to quantify the incremental effects of each appendage, and to assess the effectiveness of the control surfaces at inducing pitch and yaw motions.
This report describes the experimental equipment used during the tests, and the test methodology. Selected results from the experiments are also presented and briefly discussed. Overall, the force and moment data were generally consistent and repeatable, exhibiting expected trends. The results from these tests will add to a database of information already compiled for this generic submarine shape, and provide a source of comparative data for computational testing of the same configuration. The wind tunnel experiments will also be used to inform future experimental studies involving the testing and analysis of modern submarine shapes in the DSTO low-speed wind tunnel.
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