International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Numerical investigation of tip clearance effects on the performance of ducted propeller

  • Ding, Yongle (School of Marine Science and Technology, Northwestern Polytechnical University) ;
  • Song, Baowei (School of Marine Science and Technology, Northwestern Polytechnical University) ;
  • Wang, Peng (School of Marine Science and Technology, Northwestern Polytechnical University)
  • Received : 2015.02.03
  • Accepted : 2015.04.22
  • Published : 2015.09.30
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Abstract

Tip clearance loss is a limitation of the improvement of turbomachine performance. Previous studies show the Tip clearance loss is generated by the leakage flow through the tip clearance, and is roughly linearly proportional to the gap size. This study investigates the tip clearance effects on the performance of ducted propeller. The investigation was carried out by solving the Navier-Stokes equations with the commercial Computational Fluid Dynamic (CFD) code CFX14.5. These simulations were carried out to determine the underlying mechanisms of the tip clearance effects. The calculations were performed at three different chosen advance ratios. Simulation results showed that the tip loss slope was not linearly at high advance due to the reversed pressure at the leading edge. Three type of vortical structures were observed in the tip clearance at different clearance size.

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References

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