A Study on Theoretical Calculation Method of Pressure Fluctuation on Ship Stern Induced by Tip Vortex Cavitation

• Project/Area Number: 24760677
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Naval and maritime engineering
• Research Institution: Kyushu University
• Principal Investigator: KANEMARU Takashi 九州大学, 工学(系)研究科(研究院), 助教 (90612127)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 舶用プロペラ / 翼端渦キャビテーション / 船尾変動圧力 / パネル法 / 翼端渦流場計測 / プロペラキャビテーション / 変動圧力

Outline of Final Research Achievements

This study presents the calculation method of tip vortex cavitation and pressure fluctuation induced by the cavitation using a panel method. Also this method is incorporated in the calculation method of sheet cavitation which was developed by the previous work. The present method for pressure fluctuation on ship stern is very practical because of the short computation time. In this study, the measurement of velocity vector around the tip vortex of 3D wings is conducted using PIV in order to investigate the relation between the swept back angle and the radius of vortex core. These results are used in the prediction method of vortex core in the present study.
This study is very challenging and innovative as the calculation method based on the panel method. This is one of the features of this study because it shows the advanced application using the panel method.

Research Products

• [Journal Article] Numerical analysis of cavitating propeller and pressure fluctuation on ship stern using a simple surface panel method “SQCM” (2013)
  • Author(s): Takashi Kanemaru, Jun Ando
  • Journal Title: Journal of Marine Science and Technology Volume: Vol.18, No.3 Issue: 3 Pages: 294-309
  • DOI: 10.1007/s00773-012-0208-8
  • Peer Reviewed
• [Presentation] Numerical Analysis of Tip Vortex Cavitation on Marine Propeller Using a Simple Surface Panel Method “SQCM” (2015)
  • Author(s): Takashi Kanemaru
  • Organizer: Fourth International Symposium on Marine Propulsors
  • Place of Presentation: Austin, Texas, USA
  • Year and Date: 2015-05-31 – 2015-06-04
• [Presentation] 簡便なパネル法によるプロペラ翼端部に発生するキャビテーションの計算 (2015)
  • Author(s): 金丸崇
  • Organizer: 日本船舶海洋工学会
  • Place of Presentation: 神戸市
  • Year and Date: 2015-05-25 – 2015-05-26
• [Presentation] プロペラキャビテーションの一計算法 (2014)
  • Author(s): 金丸崇
  • Organizer: 第17回キャビテーションに関するシンポジウム 日本学術会議
  • Place of Presentation: 東京大学生産技術研究所
  • Year and Date: 2014-11-20 – 2014-11-21
• [Presentation] The Modeling of Hub Vortex for Numerical Analysis of Marine Propeller Using a Simple Surface Panel Method “SQCM” (2013)
  • Author(s): Takashi Kanemaru
  • Organizer: The Third International Symposium on Marine Propulsors
  • Place of Presentation: Launceston, Tasmania, Australia
• [Presentation] パネル法を用いたプロペラ性能計算法におけるハブ渦モデルについて (2012)
  • Author(s): 金丸崇
  • Organizer: 日本船舶海洋工学会
  • Place of Presentation: 神戸市