CHINESE
Test Facilities

We have established 32 large and medium-sized test facilities for ship and ocean engineering, with world-leading test capabilities.

POSITION：HOME-Test Facilities-Cavitation/Fluctuating Pressure & Flow Field Test

Test Facilities

Cavitation/Fluctuating Pressure & Flow Field Test

1. Test items:
• Experimental research on hydrodynamic force, noise and vibration of ships, underwater objects and appendages;
• Measurement of hydrodynamic and fluctuating pressure (in uniform flow field and non-uniform flow field);
• Noise measurement;
• Initial cavitation test;
• Measurement of velocity distribution;
• Flow visualization;
• Interrelationship test between ship detailed flow field and hydrodynamic noise;
• Propeller noise and underwater structure hydrodynamic noise test;
• Cavitation test of various appendages;
• Measurement of the velocity field around the propeller with LDV;
• Axial flow pump test;
• Hydrofoil test;
• Propeller open water test under normal/reduced pressure;
• Cavitation and flow field observation test of surface ship model appendages under reduced pressure;
 
2. Experimental facility: Circulating water tank laboratory
 
Experimental facility introduction: 
The circulating water tank laboratory was built and put into use in 2002. Main application direction: Mainly engaged in the experimental research of hydrodynamic force, noise and vibration of ships, underwater objects and appendages.
 
Main test equipment: 
Propeller dynamometer, laser velocimeter, cavitation observation and fluctuating pressure measurement system, noise measurement system, as well as large hydrophone acoustic array.

3. Experimental facility: Cavitation water tunnel laboratory
 
Facility introduction: 
Built and put into use in 1969, the cavitation water tunnel laboratory is used for research and test on hydrodynamic characteristics of aquatic moving bodies such as ships and ship propellers. At the same time, the design and performance optimization of all kinds of marine propulsors are extensively carried out.
 
Main test equipment: 
Long shaft bracket, water flow drive system, propeller speed system, propeller dynamometer, oblique current dynamometer, laser velocimeter system, noise measurement system and fluctuating pressure data acquisition system.

4. Experimental facility: Decompression towing tank laboratory
 
Experimental introduction: 
The decompression towing tank laboratory was built and put into use in 1985. Main application direction: The decompression towing tank laboratory is the only test tank in China that can simulate the Froude number and cavitation number at the same time. It is equipped with an advanced particle imaging velocimetry (PIV) system, and can undertake the research on hydrodynamic performance of semi-submerged propellers, water test of semi-submerged propeller propulsion devices, cavitation self-propelled test of high-speed ships and PIV flow field measurement.
 
Main test equipment: 
The moving object control, test data acquisition and remote wireless transmission and control system under decompression condition based on wireless network and virtual instrument technology; remote real-time observation and image transmission system of moving object flow image under decompression; onboard PIV flow field test system, propeller open water dynamometer.