Development of hub vortex estimation method by CFD computation around a propeller with dynamic overset approach

• Project/Area Number: 26420834
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: National Institute of Maritime, Port and Aviation Technology
• Principal Investigator: Kobayashi Hiroshi 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 (20361503)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 動的重合格子 / CFD / プロペラ / 構造格子 / 非定常計算

Outline of Final Research Achievements

Overset grid approach is one of ways to deal with complex geometries, simplifying grid generation and it provides flexibility to rearrange geometries. Overset grid approach is also useful for a moving body problem since it can cope with change of arrangement of computational grids by just recomputing Domain Connectivity Information(DCI) without regenerating grids.
Dynamic overset grid approach was introduced to compute unsteady flow filed such as a flow around a rotating propeller by recomputing DCI at each time steps. It is confirmed that the system has capability to simulate unsteady flow field around a rotating propeller by dynamic overset assembling approach practically.

Research Products

• [Journal Article] DEVELOPING SPLINE BASED OVERSET GRID ASSEMBLING APPROACH AND APPLICATION TO UNSTEADY FLOW AROUND A MOVING BODY (2016)
  • Author(s): Hiroshi KOBAYASHI and Yoshiaki KODAMA
  • Journal Title: Journal of Mathematics and System Science Volume: 6 Pages: 339-347
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Numerical Simulation With Overset Approach For a Bulk Carrier(JBC)In Shallow Water (2016)
  • Author(s): H. KOBAYASHI
  • Organizer: 日本船舶海洋工学会秋季講演会
  • Place of Presentation: Okayama, Japan
  • Year and Date: 2016-11-21
• [Presentation] 動的重合格子による自走する船体の数値シミュレーション (2016)
  • Author(s): K. OHASHI
  • Organizer: 日本流体力学年会2016講演論文集
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2016-09-26
• [Presentation] Flow simulation around a rotating propeller with dynamic overset grid approach (2016)
  • Author(s): H. KOBAYASHI
  • Organizer: The 7th International Conference on Computational Methods(ICCM2016)
  • Place of Presentation: Berkeley, CA, USA
  • Year and Date: 2016-08-01
  • Int'l Joint Research
• [Presentation] Performance Improvement of Flow Computations with an Overset-Grid Method including Body Motions using a Full Multigrid Method (2016)
  • Author(s): K. OHASHI
  • Organizer: ECCOMAS Congress 2016
  • Place of Presentation: Crete Island, Greece
  • Year and Date: 2016-06-05
  • Int'l Joint Research
• [Presentation] Overset grid approach for the flow behind a high block coefficient ship with an appendage (2015)
  • Author(s): Hiroshi KOBAYASHI, Kunihide OHASHI, Nobyuki HIRATA
  • Organizer: 29th CFD Symposium
  • Place of Presentation: 福岡
  • Year and Date: 2015-12-15
• [Presentation] Flow Simulations Using Overset Grid Assembler UP GRID and Navier-Stokes Solver NAGISA (2015)
  • Author(s): Hiroshi KOBAYASHI, Kunihide OHASHI, Nobyuki HIRATA
  • Organizer: Tokyo 2015 A Workshop on CFD in Ship Hydrodynamics
  • Place of Presentation: 東京
  • Year and Date: 2015-12-02
• [Presentation] DEVELOPING SPLINE BASED OVERSET GRID ASSEMBLING APPROACH AND APPLICATION TO UNSTEADY FLOW AROUND A MOVING BODY (2015)
  • Author(s): Hiroshi KOBAYASHI
  • Organizer: The sixth Conference on Computational Methods in Marine Engineering (Marine 2015)
  • Place of Presentation: イタリア、ローマ
  • Year and Date: 2015-06-15 – 2015-06-17
• [Presentation] DEVELOPING SPLINE BASED OVERSET GRID ASSEMBLING APPROACH AND APPLICATION TO UNSTEADY FLOW AROUND A MOVING BODY (2015)
  • Author(s): Hiroshi KOBAYASHI, Yoshiaki KODAMA
  • Organizer: The 6th Conference on Computational Methods in Marine Engineering (Marine 2015)
  • Place of Presentation: イタリア、ローマ
  • Year and Date: 2015-06-15