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1998 Fiscal Year Final Research Report Summary

Study on actively deforming propulsor which adapts its circumstance

Research Project

Project/Area Number 09651015
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 船舶工学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

DOI Yasuaki  Engineering, Associate Professor, 工学部, 助教授 (10134454)

Co-Investigator(Kenkyū-buntansha) NINOMIYA Sinji  Hiroshima International University Health Sciences, Associate Professor, 保健医療学部, 助教授 (60237774)
HIGO Yasushi  Engineering, Associate Professor, 工学部, 助教授 (20156582)
MORI Kazu-hiro  Engineering, Professor, 工学部, 教授 (90011171)
Project Period (FY) 1997 – 1998
KeywordsThrust / Peristaltic / waving motion / Low Reynolds Number
Research Abstract

Unsteady viscous flow fields around a peristaltic motion of body and a wavy oscillating plate in highly viscous fluid are studied. The main objective is to study the abilities of peristaltic or a wavy oscillating motion to produce thrust in highly viscous fluid.
Firstly, the measurement of force is carried out to find out the possibility of obtaining propulsive force by peristaltic motion. It is proved that a propulsion force can be generated by peristaltic motion which can be applied as a propulsor in highly viscous fluid. For further studies, numerical works are also performed to investigate the mechanism of peristaltic motion. A contractive and dilative motion of body is also studied with trochoidal motion as well as with sin wave motion It is found that the propulsive force can be more easily obtained by a trochoidal motion in extremely high viscous flow. The numerical scheme can be a useful tool for such investigation, because it is hard to be studied precisely only by experiments.
The flow around a oscillating plate is also simulated by solving the full 3D unsteady Navier-Stokes equations. Through the computation, it is found that the pressure is acting as thrusting force while the frictional force is acting as resistance during the oscillation. Dependency of the wave number and phase velocity on the thrust and propulsive efficiency is investigated. In the case of inviscid fluid, the propulsive efficiency becomes largest when the phase velocity equals to the oncoming velocity. However in the case of viscous fluid, the maximum efficiency is given when the phase velocity is higher than the oncoming velocity. As the Reynolds number becomes lower, the portion of the frictional resistance is getting large and the propulsive efficiency is getting small. Effective way to get the thrusting force at low Reynolds number is discussed through the simulation.
The present study is expected to be applied for the development of a propulsor for micro-hydro-machine.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] M-C.Kim: "A Numerical Scheme with Unstructured Moving Grid System and Its Application to Two-Dimensional Complicated Flows" J.of The Society of Naval Architects of Japan. 181. 45-53 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 水谷貴之: "高粘性流体中における推進器としてのぜん動運動について" バイオエンジニアリング講演論文集. 10. 640-641 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 用松基敬: "高粘度流体中で波状変形する矩形板による推力と流れについて" バイオエンジニアリング講演論文集. 10. 644-645 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M-C.Kim: "A Numerical Study on Propulsive Force by Contractive and Dilative Motion in Highly Viscous Fluid" Journal of the Society of Naval Architects of Japan. 183. 27-33 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D Culache: "Interface Capturing for Unsteady Free Surface Flow Simulations" 第12回数値流体力学シンポジウム. 255-256 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Moon-Chan Kim: "A Numerical Scheme with Unstructured Moving Grid System and Its Application to Two-Dimensional Complicated Flows" Journal of The Society of Naval Architects of Japan. Vol.181. 45-53 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takayiki Mizutani: "Study on peristaltic waving motion as a propelling device in highly viscous fluid" The 10th Bioengineering Conference. 10. 640-641 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Motohiro Yohmatsu: "On the thrust and flow of wavy-moving plate in highly viscous fluid" The 10th Bioengineering Conference. 10. 644-645 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Moon-Chan Kim: "A Numerical Study on Propulsive Force by Contractive and Dilative Motion in Highly Viscous Fluid" Journal of The Society of Naval Architects of Japan. Vol.183. 27-33 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Dan Culache: "Interface Capturing for Unsteady Free Surface Flow Simulations" 12th Symposium on Computational Fluid mechanics. 255-256 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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