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Model Testing

MODEL TESTING AT ARL PENN STATE

Scale-model testing of underwater vehicles and their components has been a mainstay of ARL Penn State throughout its history.  ARL Penn State has several state-of-the art test facilities.

Test Facilities
  • Garfield Thomas Water Tunnel (GTWT)
  • 48-inch diameter water tunnel
  • 12-inch diameter water tunnel
  • 6-inch diameter water tunnel
  • 1.5-inch diameter ultra-high-speed water tunnel
  • quiet pump loop
  • boundary-layer research tunnel (glycerin tunnel)
  • acoustic reverberant tank
  • flow-through anechoic chamber
  • computer resources

ARL Penn State provides qualitative and quantitative measurements on test articles from less than one inch to over 30 inches in diameter.

 High-Reynolds Number Pump (HIREP) Facility Installed in the Test Section of the 48-Inch-Diameter Water Tunnel

HIREP hatch

ARL Penn State provides state-of-the-art measurement techniques.

Instrumentation and Measurement Techniques (Link)

  • laser Doppler velocimetry (LDV)
  • particle-image velocimetry (PIV)
  • particle-shadow velocimetry (PSF)
  • laser-induced florescence
  • thermal anemometry
  • high-speed imaging
  • laser vibrometry
  • pressure measurements
  • steady and unsteady force and moment measurements
  • acoustic and vibration measurements
  • embedded sensors
  • flow visualization
  • custom experimental data design
  • dynamic balancing of rotating components

The water tunnels at ARL Penn State have variable pressure and continuous water-quality management, which provides unique cavitation measurement capabilities.

Example Images showing  Cavitation

Cavitation

ARL Penn State uses computer-aided design (CAD) to perform mechanical design, blade specification, solid modeling, and component and assembly drawings

Examples of Mechanical Design Efforts

Designs

ARL Penn State provides manufacturing and inspection capacities through CAD, computer-aided manufacturing (CAM), five-axis numerically-controlled (NC) milling machines, and coordinate-measuring machines.

Fabrication of Turbomachinery Blades on a Five-Axis Milling Machine

Inspection of Turbomachinery Blades Using a Coordinate Measuring Machine (CMM)

Secure anodizing

Blade Milling
Secure Anodizing