Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Performance Improvement of Weis-Fogh Type Ship's Propulsion Mechanism Using Spring Type Elastic Wing

  • Ro, Ki-Deok (School of Mechanical and Aerospace Engineering.Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Cheon, Jung-Hui (School of Mechanical and Aerospace Engineering, Gyeongsang National University) ;
  • Kim, Won-Cheol (School of Mechanical and Aerospace Engineering.Institute of Agriculture and Life Science, Gyeongsang National University)
  • Published : 2009.01.31
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Abstract

This experiment was conducted in attempt of improving hydrodynamic efficiency of the propulsion mechanism by installing a spring to the wing so that the opening angle of the wing in one stroke can be changed automatically, compared to the existing method of fixed maximum opening angle in Weis-Fogh type ship propulsion mechanism. Average thrust coefficient was almost fixed with all velocity ratio with the prototype, but with the spring type, thrust coefficient increased sharply as velocity ratio increased. Average propulsive efficiency was larger with bigger opening angle in the prototype, but in the spring type, the one with smaller spring coefficient had larger value. In the range over 1.0 in velocity ratio where big thrust can be generated, spring type had more than twice of propulsive efficiency increase compared to the prototype.

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References

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