|
Experiment
Towing-tank experiments are
performed for an advancing surface combatant in free roll decay
motions. Results are presented for motions (surge, sway, heave,
roll, pitch and yaw), forces (resistance, sway and heave),
moments (pitch and yaw), phase-averaged velocities (U,
V and W) for a measurement region near the bilge keel
and free surface elevations. The geometry of interest is DTMB
model 5512, which is a 1/46.6 scale geosym of DTMB model 5415
(DDG-51), with L=3.048 m. The experiments are performed
in a 3x3x100m
towing tank equipped with a plunger-type wavemaker. The
measurement systems include Krypton contactless motion tracker,
4-component load cell, towed 2-D particle image velocimetry (PIV)
system, and servo wave probes with 2-D traverse. Uncertainty
assessment following standard procedures is used to evaluate the
quality of the data.
Data, equipment, and conditions
|
Data |
Equipment |
Fr |
x4i (º) |
|
Ship motions |
Krypton motion tracker |
0.069, 0.096, 0.138, 0.19,
0.28, 0.34, 0.41 |
0, 25., 3.0, 4.0, 5.0, 7.5, 10.0,
12.5, 15.0, 20.0 |
|
Forces and moments |
Loadcell |
0.069, 0.096, 0.138, 0.19,
0.28, 0.34, 0.41 |
0, 25., 3.0, 4.0, 5.0, 7.5, 10.0,
12.5, 15.0, 20.0 |
|
Free surface |
Servo wave gages |
0.138 |
10.0 |
|
Flowfield |
2D PIV |
0.138 |
10.0 |
|
Validation data
