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A Study on the Mechanism of Initiation and Propagation of Rotating Stall

Research Project

Project/Area Number 03650161
Research Category

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

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

Principal Investigator

TAKATA Hiroyuki  Tokai University,Faculty of Engineering,Professor, 工学部, 教授 (40010699)

Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1991: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsRotating Stall / Stall Propagation / Axial Compressor / Cascade / 圧縮機翼列
Research Abstract

Flow mechanism which controls initiation and propagation of the rotating stall was studied by means of numerical simulation and experiment.
A cascade of NACA65(12)10 blades with stagger angle 30゚ and solidity 1.0 was selected as an example for the study. When a blade stalls, a stall vortex is formed on the suction surface and then an unstall vortex near the trailing edge on the same suction surface. It is shown that these vortices restrict the flow through the blade channel and, as a result , cause stall of the neighbouring blade in the course of time-thus the stall propagates.
Unstady pressure distribution on the surface of blades exposed to the rotating stall is also shown.
Next, the initiation process of the rotating stall is analyzed, and the developing transient of the small disturbance until the completion of the steadily propagating large-auplitude rotating stall is shown.
The experiment was carried out with the same blades as used in the numerical simulation placed at the test section of a linear cascade wind tunnel, and the unsteady pressure distribution on the blade surfaces is measured when the rotating stall is propagating. The purpose of the experiment is to confirm the availability of the simulation method by comparing both unsteady pressure distributions obtained each from the experiment and the numerical simulation.
However, this purpose was not accomplished because the surface pressure data accurate enough to be compared with the numerical result could not be obtained, the main reason being that the adequate data averaging method was not found for the signals taken in the randomly fluctuating rotating stall flow. The experiment is planned to be continued.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] 西沢 敏雄・高田 浩之: "失速した翼列を通る剥離流れの数値解析" 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
      1992 Final Research Report Summary
  • [Publications] T.Nishizawa and H.Tkata: "Numerical Analysis of Separated Flows through Stalled Cascade" Trans. of Japan Soc. Mech. Engrs.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary

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

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