Download leaflet Large Cavitation Tunnel as PDF.
Download leaflet High Speed Cavitation Tunnel as PDF.

The Cavitation Tunnel tests a range of propulsor designs. Large propellers can be tested at high Reynolds numbers to predict accurate cavitation behaviour. A tunnel loop is available to test the performance and cavitation properties of water jet impellers. Observation with high-speed cameras enables detailed cavitation flow investigations.

Specifications
Description Vertical plane, closed recirculating, variable speed and pressure, de-aerater
Type of drive system 1.48 m Diameter fixed pitch four-bladed axial flow impeller, thyrister controlled, 220 kW, 1200 rpm (impeller 300 rpm)
Propeller motor Thyrister controlled, 184 kW, 3000 rpm
Working section max. velocity 10 - 11 m/s
Characteristics Rectangular 0.9 m × 0.9 m with rounded corners, length 4 m
Pressure range 10 - 180 kPa
Cavitation number range σn = 0.2 - 6
Instrumentation Dynamometers, strain gauge elements, pressure transducers, hydrophones, 5-hole pitot tube, laser doppler velocity scanner, strobe lights, time lapse film recorder
Torque and thrust dynamometers Hottiger strain gauges between motor and tunnel
Thrust range ± 5000 N
Torque range ± 500 Nm
Propeller size Max. diameter 400 mm
Wake field simulation Dummy model representing aft part of single screw ship fitted to top side (centre) of test section, or dummy model representing port or starboard aft part of twin screw ship fitted to one of the top corners in the test section; length or dummy models about 3 m

Test capabilities
  • Cavitation observation tests, cavitation inception measurements and performance tests with propellers in wake field behind dummy model or in oblique flow set-up
  • Hull pressure fluctuation measurements
  • Propeller noise measurements
  • Blade spindle torque measurements
  • Measurement of forces and torques on nozzles, rudders, hydrofoils etc
  • Supercavitating propeller testing with right angle drive (up to 6000 rpm)
Contact
For more information on the Cavitation tunnel, please contact the Ships Powering department.