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Studies on the wave reflection of a slit type wave absorber having plural front walls and on the brine clarification by it.

Research Project

Project/Area Number 62550381
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Hydraulic engineering
Research InstitutionOSAKA CITY UNIVERSITY

Principal Investigator

ODA Kazuki  Professor, OSAKA CITY UNIVERSITY, Faculty of Engng., 工学部, 教授 (60047230)

Co-Investigator(Kenkyū-buntansha) KANJO Yoshinori  Research Associate, OSAKA CITY UNIVERSITY, Faculty of Engng., 工学部, 助手 (90177759)
KAKUNO Shohachi  Assistant Professor, OSAKA CITY UNIVERSITY, Faculty of Engng., 工学部, 講師 (70047398)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1988: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1987: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsSLIT TYPE WAVE ABSORBER / WAVE ABSORBING / BRINE CLARIFICATION / REAERATION / 反射率
Research Abstract

Studies on the wave reflection of a slit type wave absorber having single or plural front walls and on the reaeration ability of it have been studied for two years of 1987 and 1988. The contents of the studies are as follows: 1. A study on the wave reflection and water particle velocities through slits of a slit type wave absorber having single or double front walls. 2. Effects of the number of the front walls on the water particle velocities through slits of a slit type wave absorber. 3. Studies on scale effects on the wave reflection of a slit type wave absorber. 4. Development of a slit type wave absorber effectively dissipating wave energy for wider frequency range. 5. An analysis of the wave reflection of a slit type wave absorber under irregular wave action. 6. A numerical analysis of the wave behaviour around a slit type structures. 7. A study on the reaeration ability of a slit type wave absorber having single or plural front walls.
Through the studies(1-6) mentioned above, the … More hydraulical characteristics such as the wave reflection of slit type structures having any number of front walls or being installed on a mound can be made clear theoretically. Also, the effects of model scales or of irregular waves on the characteristics can be made clear. Therefore, dimensions required for design of slit type wave absorber, say, the most preferable dimensions of them to minimize wave reflection, can be correctly evaluated by a theory presented herein.
On the basis of the fruits, and as the final stage of the studies, the authors performed model tests on the reaeration ability of a slit type wave absorber. The tests show that the reaeration coefficient(k_2) depends strongly on water particle velocities through slits regardless of the number of the front walls of them. It should be noted that this result have not been pointed out by existing studies.
A subject which has to be analysed at the present stage is to obtain an expression by which the reaeration ability of slit type wave absorbers can be evaluated. Less

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report

Research Products

(19 results)

All Other

All Publications (19 results)

  • [Publications] 角野昇八、藤田孝、小田一紀、重松孝昌: 昭和63年度土木学会関西支部年次学術講演会講演概要. II-26-1-II-26-2 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 角野昇八、藤田孝、小田一紀、重松孝昌: 土木学会第43回学術講演会講演概要. 43. II-311-1-II-311 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 角野昇八、小田一紀、重松孝昌、芳田利春: 第35回海岸工学講演会講演論文集. 35. 557-561 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 角野昇八、小田一紀、藤田孝、天野健次、芳田利春: 平成元年度土木学会関西支部年次学術講演会講演概要. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 角野昇八、小田一紀、寺田章吾、藤田孝、芳田利春: 平成元年度土木学会関西支部年次学術講演会講演概要. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 角野昇八、小田一紀、貫上佳則、藤田孝、天野健次: 土木学会第44回年次学術講演会講演概要. 44. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S. KAKUNO; T. FUJITA; K. ODA; T. SHIGEMATSU.: "On the water particle velocities and wave reflection of a slit type wave absorber having double front walls." Proc. of the 1988 Annual Conf. of the Kansai section of the J.S.C.E.26-1 - 26-2 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S. KAKUNO; T. FUJITA; K. ODA; T. SHIGEMATSU.: "On the effects of the number of the front walls of a slit type wave absorber on the water particle velocities of it." Proc. of the 43rd Annual Conf. of the J.S.C.E., 2.43. 311-1 - 311-2 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S. KAKUNO; K. ODA; T. SHIGEMATSU; T. YOSHIDA.: "A slit type breakwater effectively dissipating wave energy for wide frequency range." Proc. of the 35th Japanese Conf. on Coastal Engng.35. 557-561 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S. KAKUNO; K. ODA; S. TERAOKA; T. FUJITA; T. YOSHIDA.: "An analysis of the wave behaviour around slit type structures by the boundary element method." Proc. of the 1989 Annual Conf. of the Kansai section of the J.S.C.E.(1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S. KAKUNO; K. ODA; Y. KANJO; T. FUJITA; K. AMANO.: "On the wave reflection of a slit type wave absorber having plural front walls and on the reaeration ability of it." Proc. of the 44th Annual Conf. of the J.S.C.E.(1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 角野昇八,藤田孝,小田一紀,重松孝昌: 昭和63年度土木学会関西支部年次学術講演会講演概要. II-26-1--II-26- (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 角野昇八,藤田孝,小田一紀,重松孝昌: 土木学会第43回年次学術講演会講演概要. 43. II-311-1--II-31 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 角田昇八,小田一紀,重松孝昌,苦田利春: 第35回海岸工学講演会論文集. 35. 557-561 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 角田昇八,小田一紀,藤田孝,天野健次,苦田利春: 平成元年度土木学会関西支部年次学術講演会講演概要. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 角田昇八,小田一紀,寺岡章吾,藤田孝,苦田利春: 平成元年度土木学会関西支部年次学術講演会講演概要. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 角田昇八,小田一紀,貫上佳則,藤田孝,天野健次: 土木学会第44回年次学術講演会講演概要. 44. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 角野昇八, 藤山孝, 小田一紀, 重松孝昌: 昭和63年度土木学会関西支部講演会講演概要. (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] 角野昇八, 藤田孝, 小田一紀, 重松孝昌: 土木学会第43回年次学術講演会講演概要. (1988)

    • Related Report
      1987 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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