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

Passive Control of Abnormal flow phenomena in Turbomachinery

Research Project

Project/Area Number 09555062
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Fluid engineering
Research InstitutionYokohama National University

Principal Investigator

KUROKAWA Jjunichi  Yokohama National University, Faculty of Engineering, Professor, 工学部, 教授 (40017976)

Co-Investigator(Kenkyū-buntansha) YAMAMOTO Kazuyoshi  EBARA RESEARCH CO., LTD., General Manager, 研究所長
IMAMURA Hiroshi  Yokohama National University, Faculty of Engineering, Research Associate, 工学部, 助手 (30303077)
MATSUI Jun  Yokohama National University, Faculty of Engineering, Assistant Professor, 工学部, 助教授 (40251756)
SUZUKI Ryoji  VOITH FUJI CO., LTD, Manager, 研究課長
吉井 総介  三菱重工業(株), 研究次長
北洞 貴也  横浜国立大学, 工学部, 助手 (30204910)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥12,000,000 (Direct Cost: ¥12,000,000)
Fiscal Year 1999: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1998: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1997: ¥4,900,000 (Direct Cost: ¥4,900,000)
KeywordsTurbomachinery / Abnormal Flow Phenomena / Performance Instability / Rotating Stall / Shallow Groove / Pressure Gradient / 浅構 / ディフューザ / 極低比速度 / 右上がり不安定性能 / 放射状態 / ターボ機械 / スクールブレ-カ / パッシブコントロール / ドラフトサージ / 旋回流
Research Abstract

The objective of this study is to suppress and control the abnormal phenomena in turbomachinery due to the swirl flow such as a rotating stall in the vaned and vanless diffuser, a performance-curve instability caused by the reverse flow at the impeller inlet in the centrifugal, mixed and axial pumps, a rotating cavitation in the pumps and the draft surge of water turbine by use of the angular momentum defect of flow in the shallow grooves mounted parallel to the pressure gradient on the casing wall.
In this study, the following results and remarks have been obtained.
・ The performance curve instability characterized by a local dent in head-capacity curve or an uprising head-capacity curve in mixed flow pump has been suppressed and controlled by use of the shallow grooves located with proper dimension.
・ The suppression of rotating stall in the vaneless diffuser has been obtained and made clear the mechanism of reducing a swirl by the grooves theoretically and experimentally.
・ By the optimization of groove dimension, the rotating stall of the vaned diffuser has been suppressed completely.
・ To reveal the possibility and the effect of the shallow grooves on controlling and reducing the swirl intensity of a runner outlet flow, a steady rotational flow in a conical diffuser of divergent angle of 30 degree was studied experimentally. The results showed that the shallow grooves with adequate dimensions can reduce the swirl rate of the main flow 85% of the inlet swirl without additional hydraulic loss.
This study showed that the abnormal flow phenomena in turbomachinery can control without decreasing the efficiency by use of the shallow grooves mounted parallel to the pressure gradient on the casing wall.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Kurokawa, J., Kajigaya, A., et al.: "Suppression of Swirl in a Conical Diffuser by Use of J-Groove"Proc. of IAHR 20th Symposium, Aug. 6-9, 2000. (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 黒川淳一、サンカル・ラル・サハ、他2名: "Jグルーブを用いた斜流ポンプの不安定性能の抑制法の開発"日本機械学会論文集(B編). 66-642. 460-467 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa J., Saha, S. L., et al.: "Passive Control of Rotating Stall in a Parallel-Wall Vaneless Diffuser by Radial Grooves"Trans. ASME, Jour. of Fluid Eng.. 122. 1-7 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa J., Saha, S. L., et al.: "An Innovative Device to Suppress Performance Curve Instability in a Mixed-Flow Pump by Use of J-Groove"Proc. of the 3rd ASME/JSME Joints Fluids Eng. Conf.. FEDSM-7200. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 黒川淳一、松井純、他3名: "浅い放射溝を用いた羽根なしディフューザの旋回失速の抑制法"日本機械学会論文集(B編). 64-620. 1135-1141 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 黒川淳一、松井純、他2名: "半径溝を用いた羽根付きディフューザの旋回失速の抑制法"第39回ターボ機械協会宇部講演会講演論文集. 67-72 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa, J., Kajigaya, A., Matsui, J. and Imamura, J.: "Suppression of Swirl in a Conical Diffuser by Use of J-Groove"Proc. of IAHR 20th Symp., Aug.. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa, J., Saha, S.L., Matsui, J., and Imamura, H.: "An Innovative Device to Suppress Performance-Curve Instability in a Mixed Flow Pump by Use of J-Groove"Trans. of JSME. Vol. 66-No. 642, Series B. 460-467 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa, J., Saha, S.L., Matsui, J., and Kitahora, T.: "Passive Control of Rotating Stall in a Parallel-Wall Vaneless Diffuser by Radial Grooves"Trans. ASME, Jour. of Fluid Eng.. vol. 122. 1-7 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa, J., Saha, S.L., Matsui, J., and Imamura, H.: "An Innovative Device to Suppress Performance-Curve Instability in a Mixed Flow Pump by Use of J-Groove"Proc. of the 3rd ASME/JSME Joints Fluids Eng. Conf.. FEDSN-7200(in CD-ROM). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa, J., Matsui, J., Kitahora, T., Miyabe, M. and Saha, S.L.: "Suppression of Rotating Stall in a Parallel-Wall Vaneless Diffuser by Radial Grooves"Trans. of JSME. Vol. 64-No. 620, Series B. 1135-1141 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kurokawa, J. Matsui, J., Kitahora, T. and Saha, S.L.: "Suppression of Rotating Stall in a Parallel-Wall Vaned Diffuser by Radial Grooves"Proc. of Turbomachinery Society of Japan 39th Symp., Ube. 67-72 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] J.Kurokawa,S.L.Saha,J.Matsui and H.Imamura: "An Innovative Device to Suppress Performance Curve Instability in A Mixed-Flow Pump by Use of J-Grooves"Proc. of the 3rd ASME/JSME Joints Fluids Eng. Conf. (in CD-ROM). FEDSM99-7200. (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] J.Kurokawa,S.L.Saha,J.Matsui and T.Kitahora: "Passive Control of Rotating Stall in a Parallel-Wall Vaneless Diffuser by Radial Grooves"Trans. ASME, Jour. of Fluid Engineering. Vol.122. 1-7 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 黒川淳一,サンカール ラル サハ,松井純,今村博: "Jグルーブを用いた斜流ポンプの不安定性能の抑制法の開発"日本機械学会論文集(B編). 66巻・642号. 460-467 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] J.Kurokawa,A.Kajigaya,J.Matsui and H.Imamura: "Suppression of Swirl in a Conical Diffuser By Use of J-Groove"IAHR 20th Symposium, 6〜9, Aug. 2000, Charlotte, NC, USA. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 黒川淳一、松井純、北洞貴他、宮部正洋、サンカル・ラル・サハ: "浅い放射溝を用いた羽根なしディフューザ旋回失速の抑制法の提案" 日本機械学会論文集(B編). 64・620. 1135-1141 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.Kurokawa,S.L.Saha,J.Matsui and H.Imamura: "An Innovative Device to Suppress Performance Curve Instability in A Mixed-Flow Pump by Use of J-Grooves" Proc.of the 3^<rd> ASME/JSME Joints Fluids Eng.Conf.July 18-23 San Francisco. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 黒川淳一,松井純,他3名: "浅い放射溝を用いた羽根なしディフューザ旋回失速の抑制法の提案" 日本機械学会論文集B編 掲載予定. 64-620. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 山下智史、黒川淳一、他2名: "平行壁羽根なしディフューザの旋回失速の特異な挙動" 日本機械学会 第74期通常総会講演会論文集III. No.97-1. 308-309 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi