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5512 Steady

Experiment

5512_steady_exp (1)Results from towing tank experiments for David Taylor Model Basin model 5512 are presented for resistance, sinkage and trim, wave profile, and nominal wake tests and uncertainty assessment. Model 5512 is a 1:46.6 scale, 3.048 m long, fiber reinforced Plexiglas hull, which is a geosim of DTMB model 5415, a 1:24.8 scale 5.72 m model. The model is unappended, i.e., not equipped with bilge keels, shafts, struts, propellers, or rudders. The resistance and sinkage and trim data are for Froude numbers 0.05-0.45 and free model condition.  The wave profiles and nominal wake data are for Froude numbers 0.28 and 0.41 and fixed-model condition (at the dynamic sinkage and trim for each Fr). The test design, measurement systems, and uncertainty assessment are described.  The uncertainty assessment methodology rigorously follows the AIAA Standard S-071-1995.   The results are discussed with regard to the data trends and uncertainties, including Fr effects.  Future work is mentioned. 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 Iowa Institute of Hydraulic Research, Istituto Nazionale per Studi ed Esperienze di Architettura Navale, and David Taylor Model Basin on experimental and computational fluid dynamics and uncertainty assessment for a combatant geometry.

 Data, Equipment, and Conditions

Data Equipment Fr Locations
Resistance 20 kg loadcell 0.05-0.45;DFr = 0.05
Sinkage and trim Linear potentiometers 0.05-0.45;DFr = 0.05
Wave profiles Markers 0.28, 0.41 x / = 0-1; Dx / L = 0.02
Near field  wave elevations Servo-type wave gages 0.28 x / = -0.2-1.3, y / L = 0-0.082
Far field wave elevations Capacitance wires 0.28 x / = -0.2-1.3, y / L = 0.082-0.39
Nominal wake flow field 2DPIV 0.28 x / = 0.935, y / L = -0.05-0, zL = -0.045-0

Sample Image

Starboard bow flow for model 5512 at Fr = 0.28.

5512_bow_wave_photo

 

Download 5415 Geometry

Click on the image below to download an .igs file of the appended model 5415 (all dimensions are given in inches).

Model_5512_rendering_perspective

 

Sample Data

Nominal wake U contours and VW vectors for Fr = 0.28.

5512_steady_NW_sampledata

 

Get Data: 5512 Steady Data

Note: If you download and use our data, please also use the following citations:

References

Gui, L., Longo, J., and Stern, F., (2001), “Biases of PIV Measurement of Turbulent Flow and the Masked Correlation-Based Interrogation,” Experiments in Fluids, Vol. 30, pp. 27-35.  (pdf)

Gui, L., Longo, J., and Stern, F., (2001), “Towing Tank PIV Measurement System, Data and Uncertainty Assessment for DTMB Model 5512,” Experiments in Fluids, Vol. 31, pp. 336-346.  (pdf)

Longo, J. and Stern, F., (2005), “Uncertainty Assessment for Towing Tank Tests With Example for Surface Combatant DTMB Model 5415,” J. Ship Research, Vol. 49, No. 1, pg. 55-68. (pdf)

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Last modified on August 3rd, 2015
Posted on September 10th, 2013