Study on Flow Assurance for Hydraulic Transport of Large Solid Paritcles in Vertically Oscillating Pipes for Subsea Mining

• Project/Area Number: 18H01648
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 24020:Marine engineering-related
• Research Institution: National Institute of Maritime, Port and Aviation Technology
• Principal Investigator: Masanobu Sotaro 国立研究開発法人海上・港湾・航空技術研究所, 海上技術安全研究所 海洋開発系, 系長 (80373413)
• Co-Investigator(Kenkyū-buntansha): 荒木 元輝 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 主任研究員 (00711350) ; 高野 慧 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (90636820)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000); Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2018: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
• Keywords: 海洋鉱物資源 / スラリー移送 / 鉛直動揺管 / 脈動流 / Flow Assurance / ポンプ性能 / 海底鉱物資源

Outline of Final Research Achievements

The lifting system is a promising method to convey the ore excavated at the seafloor to the production support vessel for subsea mining. In the present study, we focused on the pulsating slurry flow in a static vertical pipe and the flow in a vertical pipe oscillating in the axial direction. We developed the mathematical model to predict the pressure loss in the pipe, and validated the model by a comparison with experimental data.

Academic Significance and Societal Importance of the Research Achievements

大粒径固体粒子のスラリー流を対象として、鉛直動揺時もしくは脈動状態での鉛直揚鉱管内のおけるスラリー流量・圧力損失の関係を実用的に評価することが可能となった。本研究成果は、海底熱水鉱床開発における揚鉱ユニットの設計や運用に活用することができるだけでなく、コバルトリッチクラストやマンガン団塊といった他の海洋鉱物資源の揚鉱にも適用できる。

Research Products

• [Journal Article] Pressure Loss Due to Hydraulic Transport of Large Solid Particles in Vertical Pipes Under Pulsating Flow Conditions (2021)
  • Author(s): Masanobu, S., Takano, S., Kanada, S., and Ono, M.
  • Journal Title: Journal of Offshore Mechanics and Arctic Engineering Volume: Published Online Issue: 6
  • DOI: 10.1115/1.4050593
  • Peer Reviewed
• [Presentation] Experimental Investigation of Large Particle Slurry Transport in Vertically Oscillating Pipe for Subsea Mining (2021)
  • Author(s): Masanobu, S., Takano, S., Kanada, S., and Ono, M.
  • Organizer: ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2021)〔査読有：採択済〕
  • Int'l Joint Research
• [Presentation] Experimental Investigation of Large Particle Slurry Transport in Vertical Pipes with Pulsating Flow (2020)
  • Author(s): Masanobu, S., Takano, S., Kanada, S., Ono, M., and Sasagawa, H.
  • Organizer: ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2020)〔査読有〕
  • Int'l Joint Research
• [Presentation] 鉛直動揺管におけるスラリー移送に関する実験的研究 (2020)
  • Author(s): 高野慧, 正信聡太郎, 金田成雄, 小野正夫, 笹川広紀
  • Organizer: 令和2年 日本船舶海洋工学会 秋季講演会
• [Presentation] Experimental Investigation of Large Particle Slurry Transport in Vertical Pipes with Pulsating Flow (2020)
  • Author(s): Masanobu, S., Takano, S., Kanada, S., Ono, M., and Sasagawa,H.
  • Organizer: ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2020) 〔査読有：採択済〕
  • Int'l Joint Research
• [Presentation] 大粒径粒子の脈動スラリー流移送に関する研究 (2019)
  • Author(s): 高野慧、正信聡太郎、金田成雄、小野正夫、笹川広紀
  • Organizer: 令和元年度 日本船舶海洋工学会秋季講演会
• [Presentation] 船用CFDソルバーを用いた直管圧損計算 (2018)
  • Author(s): 荒木元輝、正信聡太郎、大橋訓英
  • Organizer: 平成30年 日本船舶海洋工学会秋季講演会