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1999 Fiscal Year Final Research Report Summary

The active control effects for the rotating stall in centrifugal diffuser and the elucidation of the relation between flow structure and rotating stall

Research Project

Project/Area Number 10650186
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionChiba Institute of Technology

Principal Investigator

ARIGA Ichiro  Faculty of Engineering, Chiba Institute of Technology, Professor, 工学部, 教授 (40051172)

Co-Investigator(Kenkyū-buntansha) KOYAMA Masaharu  Faculty of Engineering, Chiba Institute of Technology, Assistant Professor, 工学部, 助教授 (80083947)
SANO Masatoshi  Faculty of Engineering, Chiba Institute of Technology, Professor, 工学部, 教授 (20117708)
Project Period (FY) 1998 – 1999
KeywordsCentrifugal compressor / Vaneless diffuser / Rotating stall / Scroll / Prestall / Particle Image Velocimetry
Research Abstract

When doing an active control for the rotating stall restraint, if the condition of the occurrence of the rotating stall (prestall), the place and the structure can be specified, it can be delayed in doing disposal to the place. The experiment was carried out in one case in which the scroll was installed in the diffuser downstream and in another case it was not installed.
When the scroll was installed, the wall surface static pressure measurement ( the semiconductor pressure transducer ) near the tongue division was carried out from the prediction that the flow near the tongue division became a trigger in the rotating stall start. However, a knowledge concerning with the start of the rotating stall was not clearly obtained. The case in which there was no scroll was examined on cause of generation, structure and evolution process of rotating stall, etc. using wall surface static pressure measurement, velocity measurement ( hot-wire anemometer ) and PIV(Particle Image Velocimetry). As the result, the reverse flow developing from the diffuser exit was visualized. The flow rate of which the reverse flow was observed by PIV agreed almost with the flow rate in which it seemed to generate the rotating stall from the frequency analysis of the velocity and pressure signals and the change of standard deviation of each signal.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] N. Hayashi, M. Koyama, I Ariga: "Study of Flow Pattern in Vaneless Diffuser of Centrifugal Compressor using PIV"10th International Symposium on Application of Laser Techniques to Fluid Mechanics. Lisbon, Portugal, July 10-13, 2000.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Hayashi, M.Koyama, I.Ariga: "Study of Flow Pattern in Vaneless Diffuser of Centrifugal Compressor using PIV"10ィイD1thィエD1 International Symposium on Application of Laser Thechniques to FLUID Mechanics, Lisbon, Portugal. (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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