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Development of viscous CFD technique for cavitating propeller using improved interface capturing scheme and cavitation modeling

Research Project

Project/Area Number 19K04872
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 24020:Marine engineering-related
Research InstitutionNational Institute of Maritime, Port and Aviation Technology

Principal Investigator

Sakamoto Nobuaki  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 (80550003)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords舶用プロペラ / キャビテーション / THINC法 / 構造重合格子 / 有限体積法 / 粘性CFD / プロペラキャビテーション / 界面捕獲法 / キャビテーションモデル / 二相流 / 舶用プロペラキャビテーション / 気泡力学
Outline of Research at the Start

本研究では、新しい代数的VoF法と重合格子法を併用した高精度界面捕獲手法の開発、および気泡力学ベースのキャビテーションモデル改良を行い、舶用プロペラキャビテーション計算に適した粘性CFD手法を構築する。本研究には、海上技術安全研究所で開発を進めている舶用CFDソルバー”NAGISA”を用いる。界面捕獲法には、数値拡散の少ない多次元THINC法を採用し、局所空間解像度を上げるために重合格子を併用する。キャビテーションモデルには従来の気泡力学ベースの手法に、メソスケール要素を取り入れ、気泡の生成・消滅項のモデル化を改良する。開発した手法による計算結果は、水槽試験結果等と比較しその妥当性を確認する。

Outline of Final Research Achievements

On evaluating cavitation extent around marine propellers using viscous CFD, computations tend to depent on commertial CFD solver with unstructured grid which sometimes yields high computational expense since very fine grid is to be prepared to prevent numerical diffusion of cavitation interface. In the present study, structured overset FVM solver becomes the base of development. On the solver, algebraic-type VoF advection scheme "THINC" is implemented, in the meantime, two fundamental cavitation models (Zwart-Geber-Belamri, Schnerr-Sauer) based on simplified Rayleigh-Plesset equation are introduced. Resultant code are able to solve unsteady cavitation phenomena around 2D naca0015 and a 3D marine propeller operating in a ship wake without/with energy saving device.

Academic Significance and Societal Importance of the Research Achievements

本研究では、従来非構造格子ベースの商用ソルバーに依存しがちであった、舶用プロペラ周りに発生するキャビテーションの推定を、構造重合格子ベースの自作ソルバーを用い、比較的少ない格子数で精度良く計算可能とするための粘性CFD計算コードを開発した。ソルバーのキャビテーション計算に対する精度については、より定量的な検証が必要とはなるものの、比較的低い計算負荷で、舶用プロペラに発生するキャビテーション計算を可能とする基礎技術の開発が完了したと考えられる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Fundamental Validation of Cavitation and Interface Capturing Models implemented on NAGISA2021

    • Author(s)
      Nobuaki Sakamoto, Kunihide Ohashi
    • Journal Title

      日本混相流学会 混相流シンポジウム2021 講演論文集

      Volume: -

    • Related Report
      2021 Research-status Report
  • [Journal Article] CFD based form factor determination method2021

    • Author(s)
      Korkmaz Kadir Burak、Werner Sofia、Sakamoto Nobuaki、Queutey Patrick、Deng Ganbo、Yuling Gao、Guoxiang Dong、Maki Kevin、Ye Haixuan、Akinturk Ayhan、Sayeed Tanvir、Hino Takanori、Zhao Feng、Tezdogan Tahsin、Demirel Yigit Kemal、Bensow Rickard
    • Journal Title

      Ocean Engineering

      Volume: 220 Pages: 108451-108451

    • DOI

      10.1016/j.oceaneng.2020.108451

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Application of "THINC" interface capturing scheme to the structured overset CFD solver2020

    • Author(s)
      Nobuaki Sakamoto, Hiroshi Kobayashi, Kunihide Ohashi
    • Journal Title

      日本混相流学会 混相流シンポジウム2020 講演論文集

      Volume: 1 Pages: 1-2

    • Related Report
      2020 Research-status Report
  • [Presentation] Fundamental Validation of Cavitation and Interface Capturing Models implemented on NAGISA2021

    • Author(s)
      Nobuaki Sakamoto
    • Organizer
      混相流シンポジウム2021
    • Related Report
      2021 Research-status Report
  • [Presentation] Application of "THINC" interface capturing scheme to the structured overset CFD solver2020

    • Author(s)
      Nobuaki Sakamoto
    • Organizer
      混相流シンポジウム2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Estimation of Flows around a Full-Scale Ship by Structured Overset RaNS Code “NAGISA”2019

    • Author(s)
      Nobuaki Sakamoto, Hiroshi Kobayashi and Kunihide Ohashi
    • Organizer
      11th International Workshop on Ship and Marine Hydrodynamics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Overset RaNS Computation of Flow around Bulk Carrier with ESD in Full Scale and its Validation2019

    • Author(s)
      Nobuaki Sakamoto, Hiroshi Kobayashi and Kunihide Ohashi
    • Organizer
      令和元年 日本船舶海洋工学会 秋季講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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