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US Navy Combatant, DTMB 5415

Description:

Model 5415 was conceived as a preliminary design for a Navy surface combatant ca. 1980. The hull geometry includes both a sonar dome and transom stern. Propulsion is provided through twin open-water propellers driven by shafts supported by struts.

No full-scale ship exists.

The hull geometry and relevant loading conditions and speeds are described under Geometry and Conditions, from where the hull description can be downloaded in the form of an IGES-file.

The model tests data for the 5415 includes:

1. Local flow measurements (Mean velocity and cross flow vectors). Olivieri et al (2001).
2. PIV-measured nominal wake in regular head waves (Mean velocity, turbulent kinetic energy, and Reynolds stresses). Longo et al (2007).
3. Resistance, sinkage, trim, and wave profiles. Olivieri et al (2001).
4. Wave diffraction (Waves, 1st harmonic amplitude of mean velocities, turbulent kinetic energy, and Reynolds stresses).Longo et al (2007), Hino et al (2005).
5. Roll decay (Motion, free surface, mean velocities). Irvine et al (2004).

Raw model test data are downloadable via the FTP server. Guidelines for the output from the CFD predictions are given under Instructions to participants. Note that there are specific instructions as well as a questionnaire to be filled out for each method.

References:

(3-1) Olivieri, A., Pistani. F., Avanaini, A., Stern, F., and Penna, R. (2001), “Towing Tank Experiments of Resistance, Sinkage and Trim, Boundary Layer, Wake, and Free Surface Flow Around a Naval Combatant INSEAN 2340 Model,” Iowa Institute of Hydraulic Research, The University of Iowa, IIHR Report No. 421, 56 pp.

(3-2) Longo, J., Shao, J., Irvine, M., and Stern, F. (2007), “Phase-Averaged PIV for the Nominal Wake of a Surface Ship in Regular Head Waves,” ASME J. Fluids Eng, Vol. 129, pp. 524-540.

(3-3) Hino, T. (2005, ed.), “Proceedings of the CFD Workshop Tokyo 2005”, NMRI Report (Test case 4).

(3-4) Irvine, M., Longo, J., Stern, F. (2004), “Towing Tank Tests for Surface Combatant for Free Roll Decay and Coupled Pitch and Heave Motions,” Proc. 25th ONR Symposium on Naval Hydrodynamics, St Johns, Canada.