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Characteristics and Application to Manufacturing Technique of Spiral Jets

Research Project

Project/Area Number 10650177
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionHiroshima University

Principal Investigator

SUDOU Kouzou  Hiroshima Univ., Fac. of Eng., Professor, 工学部, 教授 (70016509)

Co-Investigator(Kenkyū-buntansha) HIBARA Hideki  Hiroshima Univ., Fac. of Eng., Research Associate, 工学部, 助手 (80271071)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsJet / Nozzle / Velocity Distribution / Pressure Distribution / Turbulence / Diffusion / Hot-wire / Rotating Probe Technique / 回転プローブ法
Research Abstract

1. Contents of research made in 1998-1999
(1)Nozzles of seven types affected to fluid characteristics of spiral jet have been made.
(2)The distributions of velocity and static pressure Issuing from each nozzle are measured and jet characteristics are investigated.
(3)In case of swirling jet issuing from taper nozzle, flow visualization and velocity measurement have been carried out and jet characteristics have been Investigated.
2. Results obtained In 1998-1999
(1)In case of the jet issuing from taper nozzle, static pressure on the nozzle axis at the nozzle exit becomes higher with an increase of taper angle. Downstream static pressure falls down rapidly and pressure gradient becomes steeper with an increase of taper angle.
(2)In case of the jet Issuing from taper nozzle, the fluid is accelerated near the nozzle exit and its degree of acceleration becomes larger with an increase of taper angle.
(3)In case of the jet with swirl issuing from taper nozzle, jet width becomes wider with an increase of taper angle.
(4)In case of the jet with swirl issuing from tapered nozzle, Reynolds stress becomes larger with an Increase of taper angle and accordingly the turbulent diffusion becomes more marked with an increase of taper angle.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 須藤 浩三: "軸対称噴流に及ぼすノズル形状の影響"日本機械学会講演論文集. 995・1. 161-162 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 須藤 浩三: "壁面の衝突する旋回噴流"日本機械学会講演論文集. 993・1. 329-330 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 須藤 浩三: "軸対称噴流に及ぼすノズル形状の影響"日本機械学会公演論文集. 994・2. 5-17-5-18 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kozo SUDO: "Effect of the Nozzle Shape on Axisymmetric Jet"Proc. of Jpn. Soc. Mech. Eng.. 995-1. 161-162 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kozo SUDO: "Swimming Jet Impingjng on a Solid Surface"Proc. of Jpn. Soc. Mech. Eng.. 993-1. 329-330 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kozo SUDO: "Effect of the Nozzle Shape on Axisymmetric Jet"Proc. of Jpn. Soc. Mech. Eng.. 994-2. 5-17-5-18 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 須藤浩三: "軸対称噴流に及ぼすノズル形状の影響"日本機械学会講演論文集. 994・2. 5-17-5-18 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 須藤浩三: "軸対称噴流に及ぼすノズル形状の影響" 日本機械学会講演論文集. 995-1. 161-162 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 須藤浩三: "壁面に衝突する旋回噴流" 日本機械学会講演論文集. (発表予定).

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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