Local Roughness Effect on Self-Propulsion Factors

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概要

• 論文の詳細を見る

• Resistance tests, self-propulsion tests and wake measurements in the plane of propeller were carried out for a VLCC model which was roughened artificially. The tests were made varying the roughened part lengthwise. As a result it was found that wake fraction was affected significantly by the roughness of the last quarter length of a ship, while thrust deduction fraction and relative rotative efficiency were almost unchanged for any surface roughness conditions for the same surface roughness of each part. Such a change of wake fraction due to local surface roughness can be explained well by the turbulent boundary layer calculations for smooth and roughened surfaces.

• 社団法人日本船舶海洋工学会の論文
• 1982-03-03

著者

• 徳永 啓三

  Nagoya Aircraft Works, Mitsubishi Heavy Industries, Ltd.

• 徳永 啓三

  Nagasaki Experimental Tank, MHI

• 徳永 啓三

  Nagasaki Experimental Tank Mitsubishi Heavy Industries Ltd.

• 徳永 啓三

  Nagoya Aircraft Works Mitsubishi Heavy Industries Ltd.

関連論文

• Experimental Study on Turbulent Frictional Drag Reduction by Nonplanar Geometries
• Prediction of Effective Wake Distribution for a Body of Revolution
• Reduction of Frictional Resistance of a Flat Plate by Microbubbles
• Stern flow control by use of bilge rotors
• Local Roughness Effect on Self-Propulsion Factors
• A Study on Local Roughness Effect on Ship Resistance
• Approximate Calculation of Ship Frictional Resistance Increase due to Surface Roughness

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