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Study of Drag Reduction of Ship by Different Coating and Paint

Kianejad, Sadroddin | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43565 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Seif, Mohammad Saeed
  7. Abstract:
  8. Reduction ships resistance is the major issues that always been about moving the ship into a water. In the course of research, many scientists have been interest to resistance reduction. It is important protect the body of ship against damage caused by sticking marine algae and crustaceans as protection against corrosive agents. Marine organisms such as algae, crustaceans and bacteria stick on submerged surfaces and increase the ship resistance. In this thesis resistance reduction using coating is evaluated. Foul release paint make smooth surface and low surface energy therefore ship with foul release coating experience lower drag contrast ship with another coating in the unfouled condition. The smooth surface and low surface energy are cause that they prevent the attachment of the organisms to ship surface. The influence of surface energy and roughness of coating are evaluated by model test and numerical simulation. In experimental research, model with difference coating and equal roughness evaluated, the result show model with lower surface energy experience lower resistance. Numerical simulation performed for three coating and result show surface with higher roughness experience higher resistance. Finally, the impact of riblet on resistance reduction of flat surface evaluated and show riblet decrease resistance.

  9. Keywords:
  10. Skid Resistance ; Model Test ; Numerical Simulation ; Foul Release ; Riblet

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