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Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0015
... wave probe wave spectrum cross correlation modeling & simulation time step model motion contractor 1 model test prediction ship motion contractor 2 wave spectra ship experiment contractor time lag The US Nav has developed a real-time multi-ship ship motion forecasting...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0012
... the necessity for, and the utility of, using such a method. HISTORICAL BACKGROUND Resistance and Propulsion Experiments At the U.S. Navy s original Experimental Model Basin (EMB) and at its David Taylor Model Basin (DTMB) the method used up until about 1970 was to determine the hull resistance using a gravity...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0056
.... EXPERIMENT SETUP Figure 1. The scenario of the experimental facility Table 1. Principaldimensionless parameters Parameter Vr U / fnD Re= UD/ m* me / md Ay / D a L/D c / 2 (m ma )k Meaning Reduced velocity Reynolds number Mass ratio Transversal amplitude ratio Aspect ratio Damping ratio The fluid...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0007
... Roll-on Roll-off (Ro-Ro) ships can experience rapid capsize due to the loss of ship metacentric height from the free surface effect of vehicle deck flooding. To reduce the free surface effect it is useful to add subdivisions or partitions to the vehicle deck. This paper summarizes the results...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0003
...° and Froude number Fr = 0.28. The TPIV enables fully volumetric flow measurements and the use of -criteria enables vortex volume visualization and core analysis. The objective of the experiment is to extend the knowledge for the static condition vortex separation onset and progression to unsteady dynamic...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0043
..., the experimental and numerical results will be compared and validated. The instrumentation methodology for log boom line experiments are presented in Castro, Katsuno and Dantas (2017), submitted to ATTC 2017. The presentation in this paper of numerical methodology will take place in several steps. The methodology...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0042
..., to aid in the rapid development and analysis of conceptual designs in order to facilitate full-scale evaluation. marine transportation reduce drag reservoir simulation model test upstream oil & gas high speed vehicle experiment aft lifting body baseline transom flap configuration...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0018
... experimental works include that of Peterson et al. (1997), Judge et al. (2004), and Ikeda et al. (2015). In addition to hydroelastic theoretical studies, Royce (2001) performed wedge impact experiments of a model that utilized a method of hydroelastic shock mitigation incorporating air bag end springs...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0055
... affect the flow itself. Non-invasive techniques, including sonic methods and laser-enabled technologies, avoid this issue, though there are benefits and drawbacks associated with these techniques as well. Measurement system complexity, in particular, can drive experimental cost and schedule. Some proven...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0036
..., refer to Appendix A of (Lin et al., 2017). Physical Experiment The work herein uses experimental results from R/V Melville, Model 5748, a 1:23 scale physical model. Testing was conducted June 29, 2016 to July 7, 2016 at the Naval Surface Warfare Center, Carderock Division (NSWCCD) in Bethesda, Maryland...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0027
... ship was also executed because concerns of large passenger ships in beam wind and waves triggered the development of the new criteria for stability under dead ship condition. Some preliminary but important outcomes from this experiment are also reported in this paper. EXPERIMENTAL METHOD The model...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-022
... In this paper, two experimental facilities that simulate separate regions of the flow about a slender ship moving at constant speed in calm water are described. In the first facility, divergent bow waves are simulated. These waves are generated by a method known as 2D+T in which a two...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-029
... separately following a description of the SPP test apparatus and the experimental conditions. SPP TEST SYSTEM AND EXPERIMENTAL CONDITIONS The experiments were conducted in the Davidson Laboratory High Speed Towing Tank (DLHSTT) at the Stevens Institute of Technology. The Davidson Lab provided the towing...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-009
... quantitative comparison of existing data to support this has not yet been undertaken. For the measurement of highly aerated flows such as the transom stern wake, no additional surface roughness is needed. EXPERIMENTAL RESULTS In 2007 and 2008 NSWCCD conducted two experiments on Model 5673, which was designed...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-002
...). 11 BACKGROUND Previous Experiments In order to obtain ship-specific damping information, roll decay or forced roll oscillation experiments should be performed. Experiments have been performed for naval vessels at the United States Experimental Model Basin (McEntee, 1920; 1931); for cylindrical ship...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-005
... experimentation is necessary in order to draw conclusions about the wave loads applied on the skirt. sensor aircushion excess pressure encounter frequency input level vehicle frequency aircat amplitude spectrum cobblestone effect deflection bow skirt wave tank wave load hypothesis experiment...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-023
... of the motion card s interpolation software. EXPERIMENTAL APPLICATIONS Using the 3DoF mechanism, a series of experiments were conducted with DTMB Model #5699 including 1DoF large amplitude sway, heave, and roll oscillations (Bassler, et al., 2010a; Belknap, et al., 2010). The principal particulars of the model...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-015
..., and the application of an appropriately sized non-skid coating to the model is required for fidelity of model maneuvering experiments. Three methods to scale the coating have been investigated, and conventional geometric scaling and wall shear velocity scaling methods were found to be inadequate. A new scaling...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-016
... regular wave model experiment experiment basin brownell wave field evaluation north america government dynamic stability experiment spectral shape requirement THE 29th AMERICAN TOWING TANK CONFERENCE ANNAPOLIS, MARYLAND, AUGUST 2010 Naval Surface Warfare Center s Wavemaker Modernization...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-001
... In the winter of 2008, NASA’s Constellation Program Office initiated a full scale experimental program to quantify the hydrodynamic performance of the Orion Crew Module. The intent of such an experiment was to give real world experience to the DoD recovery forces tasked with recovery...

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