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

Flow Control of Vaneless Diffuser Rotating Stall

Research Project

Project/Area Number 02650134
Research Category

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

Allocation TypeSingle-year Grants
Research Field Fluid engineering
Research InstitutionOsaka University

Principal Investigator

TSUJIMOTO Yoshinobu  Osaka University, Engineering Science, Professor, 基礎工学部, 教授 (50112024)

Co-Investigator(Kenkyū-buntansha) TSURUSAKI Hiromu  Fukuyama University, Engineering, Associate Professor, 工学部, 助教授 (60112025)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
KeywordsFluid Machinery / Vaneless Diffuser / Rotating Stall / Active Control / 旋回矢定 / 境界層 / 制御 / 逆流 / タ-ボ機械
Research Abstract

In order to elucidate the role of the diffuser wall boundary layers in diffuser rotating stalls, boundary layer suction was applied at various radial locations. The onset flow was increased by the suction owing to the decrease in the main flow rate, showing that the current explanation attributing to the reverse flow is not adequate.
A 2-D inviscid, nonlinear diffuser flow anaysis was made. At smaller flow rates, flow patterns similar to that observed in experiments appeared when the vorticity from the inpeller constitutes a certain pattern. However, the onset condition is too severe compared with experiments and the instability did not occur when the effects of skin friction on the diffuser wall was taken into account. Thus, the simulated instability looks to be different from those observed experimentally.
Discussions on the energy balance of rotating stall were made from the results of an active control of the rotating stall. The control was made by introducing a fluctuating flow at the diffuser inlet, which is in a certain phase relation with the rotating stall. Discrete frequency component due to rotating, stall completely disappeared in the whole diffuser indicating that the control is not due to a mere linear superposition of the disturbance but the rotation stall flow itself is changed by the addition of the disturbance. The energy transferred to the diffuser flow by the displacement effect of the fluctuating flow was related with the controlled rotating stall amplitude. It was shown that the amplitude decreased when the energy is negative. From this result, the quantitative discussion was made as to the relation between the amplitude and the energy balance of vaneless diffuser rotating stall.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 立石 智裕ほか3名: "ベ-ンレスディフュ-ザの旋回失速の能動制御" 日本機械学会関西支部第250回講演会講演論文集. 940ー4. 182-184 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 吉田 義樹ほか3名: "ベ-ンレスディフュ-ザの旋回失速の能動制御" 日本機械学会論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Tateishi et al.: " "Active Control of Vaneless Diffuser Rotating Stall", (in Japanese)" Prepr. of Jpn. Soc. Mech. Eng.940-4. 182-184 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Y. Yoshida et al.: " "Active Control of Vaneless Diffuser Rotating Stall", (in Japanese)" Trans. Jpn. Soc. Mech. Eng.(1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 立石 智裕ほか3名: "ベ-ンレスディフュ-ザの旋回矢定の能動制御" 日本機械学会関西支部第250回講演会 講演論文集. 940ー4. 182-184 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 吉田 義樹ほか3名: "ベ-ンレスディフュ-ザの旋回矢定の能動制御" 日本機械学会論文集.

    • Related Report
      1991 Annual Research Report
  • [Publications] 辻本 良信・〓崎 展: "ベ-ンレスディフュ-ザの旋回失速における壁面境界層の役割" 日本機械学会論文集.

    • Related Report
      1990 Annual Research Report

URL: 

Published: 1991-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi