Model Test of AUV

Oceanic's team of engineers uses a variety of methods and techniques to visualize the different flows over a hull, around an appendage or in way of over-the-side equipment. In addition to mapping local flow patterns for alignment of bilge keels and stabilizer fins, understanding global flow patterns can often give a designer significant insight into the behavior of a marine vehicle.

For appendage alignment, the common method is to use a series of wool tufts on the model surface and record their resultant orientation using underwater video cameras. Using these cameras, dynamic waterline profiles can be established without incurring the problems normally associated with using surface cameras. Alternate methods available include: paint streak, particle imaging, and dye injection. The choice of method is dependent on the requirements of the test and the specifics of the vehicle being examined.

Related Projects:

• High-speed Catamaran - Tests involving dynamic wetted area measurements.
  
• Performance of a Sailing Hull - Tests involving upstream disturbance of a high-lift rudder.
  
• High-lift Geophysical Spreader-vanes. An evaluation involving vortex mapping downstream.
  
• Heeled/Yawed Sailing Hulls - Program involving dynamic wetted area.
  
• Semi-submersibles - An evaluation of flow around the structure in current.
  
• Articulated Tug-barge Unit - An investigation of flow in way of the barge stern-notch.
  
• Mega-yachts - Tests involving alignment of bilge-keels stabilizer fins.