HYDRO-PLANE BOAT HULL ANALYSIS AND DESIGN

Submitted by: WaveTech Industries

Sponsors: Sun Valley FiberglassDr. Robert WoodsDr. Raul Fernandez

Date Submitted: 8 May 2015

HISTORYSun Valley Fiberglass owns the mold for a open canopy

hydro-plane racing boat that has suffered significant damage.

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OBJECTIVEDesign a closed canopy

configuration based off of the current design.

Conduct CFD analysis on the candidate designs to determine stability.

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SCANNINGA white light 3D scanner was used to capture the hulls

current geometry.

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PROCESSINGThe scanned data was then converted from a point cloud

into a series of sketches that could be imported into Solidworks.

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POINTCLOUD TO SKETCHES

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SOLID MODEL CREATIONA new candidate design

was then created in Solidworks with the following changes:

1) Closed canopy 2) Extended rear section 3) Modified sponson 4) Removed mold warping

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CFD ANALYSISThe candidate design was then subjected to CFD analysis in

Star CCM+, the simulations conducted with the following parameters:1) Angle of attacks ranging from 0-25 degrees2) Constant velocity of 150 mph3) Aerodynamic and hydrodynamic flow

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CFD OUTPUTSThree main outputs of the simulations:

1) Total lift2) Total drag3) Total moment

These three outputs were used to calculate the stability of the hull.

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STABILITY ANALYSISStability is defined by the location of the line of pressure

relative to the center of gravity.

If the line of pressure is too far forward of the CG then the hull is unstable, if it is rear of the CG the hull is less unstable.

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FREE BODY DIAGRAM

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STABILITY CALCULATIONS

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LINE OF PRESSURE DIAGRAM

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Rm

θ

LINE OF PRESSURE

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0 5 10 15 20 25-500.0-450.0-400.0-350.0-300.0-250.0-200.0-150.0-100.0-50.00.0

50.0

Distance Between CG and Line of Pressure

Angle of Attack (degrees)

Δx

CONCLUSIONThe candidate design was found to be stable at angel of

attack equal to or less than 5° or less at a speed of 150 mph.

With the Solidworks design this project would be capable of proceeding to production with reasonable assurance of the hulls stability based off of the simulation data.

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Q&A