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Thruster/POD Bollard Pull cavitation test

  • The bollard pull test is performed in the upper measuring section of KHRC free-surface cavitation tunnel T-31.
  • At the bollard pull test, thrust and torque are measured at a range of different cavitation numbers σ’, by changing the shaft speed and tunnel pressure with no water velocity.
  • The result is presented in a diagram showing non-dimensional thrust and torque coefficients, KT and KQ as a function of the cavitation number, σ’.
  • Cavitation on the propeller and nozzle are​ observed and documented at different​ cavitation numbers and propeller loadings​ using stroboscopic light and standard digital​ cameras.