English

DTIC ADA458075: Towing Tank Experiments of Resistance, Sinkage and Trim, Boundary Layer, Wake, and Free Surface Flow Around a Naval Combatant Insean 2340 Model

Results from towing tank experiments regarding resistance, sinkage and trim, far field wave elevation, boundary layer and wake of the INSEAN 2340 model are presented. The resistance and sinkage and trim tests are for Froude numbers between Fr = 0.05 and Fr = 0.41 and free model conditions. Wave profiles and far field wave elevations have been carried out at two Froude numbers namely Fr = 0.28 and Fr = 0.41. Mean velocity field and total head in the boundary layer and wake have been measured by 5-hole Pitot probe at Fr = 0.28. The test design, measurement system and the uncertainty assessment have been described both for wave elevation and velocity fields. The uncertainty assessment methodology follows the AIAA Standard S-071-1995. The data contributes to the surface-ship resistance and propulsion model-scale database for computational fluid dynamics validation, as part of an international collaborative project between INSEAN, Iowa Institute of Hydraulic Research (IIHR) and David Taylor Model Basin (DTMB) on experimental and computational fluid dynamics and uncertainty assessment for a combatant geometry [1].

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