• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2007 Fiscal Year Final Research Report Summary

RESEARCH ON TOTAL SUPPRESSION OF ABNORMAL FLOW PHENOMENAIN TURBOMASCHINERY

Research Project

Project/Area Number 18360085
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

KUROKAWA Junichi  Yokohama National University, ENGINEERING, PROFESSOR (40017976)

Co-Investigator(Kenkyū-buntansha) MATSUI Jun  YOKOHAMA NATIONAL UNIVERSITY, ENGINEERING, ASSOCIATE PROFESSOR (40251756)
CHOI Young-do  YOKOHAMA NATIONAL UNIVERSITY, ENGINEERING, ASSISTANT (90361865)
Project Period (FY) 2006 – 2007
KeywordsTURBOMACHINERY / ABNORMAL FLOW PHENOMENA / J-GROOVE / SUPPRESSION METHOD / SUCTION PERFORMANCE / SURGE / ROTATING STALL / PERFORMANCE CURVE INSTABILITY
Research Abstract

In operating turbomachinery at off-design conditions, various abnormal flow phenomena occur, resulting in noise and vibration. In order to establish an outstanding technology characteristic of Japan, which can totally suppress these abnormal flow phenomena without dropping total efficiency, the experimental research and the numerical simulations were preceded.
In the fast step of research, inducers were tested, as the most severe cavitation phenomena are usually observed. J-Groove technique was applied to several inducers, and the results showed that the cavitation is suppressed drastically in the low flow range and the suction performance is improved to twice the conventional when the groove is optimized In the high flow range the suction performance can also be improved to 15 times the conventional, when J-Groove is coupled with a swirl stop. Next, the J-Groove technique was applied to centrifugal pumps of semi-open impeller, the suction performance is improved considerably without dropping the maximum efficiency, however in the case of closed impeller J-Groove is difficult to apply because of its shape. Here is proposed a new impeller of semi-closed type with J-Groove, resulting in perfect suppression of performance curve instability without dropping the maximum efficiency, and also in improving suction performance in the high flow range.
In the second step, centrifugal compressor was tested as the most severe surge is usually observed Experiment revealed that J-Groove technique is very effective in suppressing surge and in enlarging surge-margin. From numerical simulations, it was made clear that the initiation of rotating stall of diffuser is of key importance to suppress surge, and that J-Groove technique is successfully applied to suppress the initiation of rotating stall and to enlarge surge-margin to a large extent when it is mounted near the outlet of diffuser, though its effect becomes less when mounted near the inlet of diffuser.

  • Research Products

    (11 results)

All 2007 2006

All Journal Article (8 results) (of which Peer Reviewed: 4 results) Presentation (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Suppression of Cavitation in Inducers by J-Grooves2007

    • Author(s)
      Choi Y. D.
    • Journal Title

      Journal of Fluids Engineering, Trans. ASME Vol.129

      Pages: 15,22

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] J-Grooveによる軸流ポンプの不安定性能と吸込み性能の向上2007

    • Author(s)
      黒川淳一
    • Journal Title

      ターボ機械 35

      Pages: 737,744

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Suppression of Performance Curve Instability in Axial Flow Pump by J-Groove2007

    • Author(s)
      Kurokawa, J., et. al.
    • Journal Title

      Proceedings of Asian Fluid Machinery Conference Vol.1

      Pages: No.195(1-8)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Suppression of Cavitation in Inducers by J-Grooves2007

    • Author(s)
      Choi, Y.D., Kurokawa, J., others
    • Journal Title

      Journal of Fluids Engineering, Trans. ASME Vol.129

      Pages: 15-22

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Improvement of Performance curve Instability and Suction Perform of Axial Flow Pump by J-Groove2007

    • Author(s)
      Kurokawa, J., Matsui, J., others
    • Journal Title

      Turbomachinery(in Japanese) Vol.35, No.12

      Pages: 737-744

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Suppression of Performance Curve Instability in Axial Flow Pump by J-Groove2007

    • Author(s)
      Kurokawa, J.,, et. al.
    • Journal Title

      Proceedings of Asian Fluid Machinery Conference Vol.1

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Improvement of Pump Performance and Suppression of Cavitation in a Centrifugal Pump by J-Groove2006

    • Author(s)
      Choi Y. D.
    • Journal Title

      Proceedings of 23rd IAHR Symposium on Hydraulic Machinery and Systems Vol.1

      Pages: No.2.1(1-8)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Improvement of Pump Performance and Suppression of Cavitation in a Centrifugal Pump by J-Groove2006

    • Author(s)
      Choi, Y.D., Kurokawa, J., others
    • Journal Title

      Proceedings of 23rd IAHR Symposium on Hydraulic Machinery and Systems Vol.1

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 羽根なしディフューザの旋回失速とJグルーブの効果2007

    • Author(s)
      黒川淳一
    • Organizer
      ターボ機械協会
    • Place of Presentation
      佐賀地方講演会(佐賀大)
    • Year and Date
      2007-09-19
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Rotating Stall of Parallel-Walled Vaneless Diffuser and Effect of J-Groove2007

    • Author(s)
      Kurokawa, J., Koyanagi, Y., Matsui, J
    • Organizer
      Preprint of Turbomachinery Society Vol, 1
    • Place of Presentation
      Saga University
    • Year and Date
      2007-09-19
    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] Jグルーブポンプ2007

    • Inventor(s)
      黒川淳一, 香川修作
    • Industrial Property Rights Holder
      横浜国立大学
    • Industrial Property Number
      発明・特願2007-126169
    • Filing Date
      2007-05-11
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2010-02-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi