Bow Wave Measurements of the R/V Athena 1: 2003
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
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The bow wave of the Research Vessel Athena I was quantified using a Quantitative Flow Visualization QViz system developed at the Naval Surface Warfare Center, Carderock Division. Although this technique has been used extensively in the towing tank, this experiment represents the first time that such measurements have been obtained in the full scale environment. Measurements were obtained in the protected waters of St. Andrews Bay in proximity to Panama City Beach, Florida over a three day time period, from 29-31 October 2003. The Athena was operated at four speeds 6 knots 3.1 ms, 9 knots 4.6 ms, 10.5 knots 5.4 ms, and 12 knots 6.2ms, corresponding to Froude numbers based on waterline length 47 m of 0.14, 0.21, 0.25, and 0.29, respectively. Data was collected at seven axial locations, in 1-foot intervals, along the bow. The data were of very good quality with the increase in noise being offset by an increase in signal strength. Predictions from the non-linear potential flow code, DAS BOOT, are compared to the experimental data at 9 knots and demonstrate excellent agreement.
- Physical and Dynamic Oceanography
- Marine Engineering
- Fluid Mechanics