The analysis on centrifugal compressor rotating stall

원심압축기의 선회실속 분석

  • 김지환 (한국과학기술연구원 열유동제어 센터) ;
  • 김광호 (한국과학기술연구원 열유동제어 센터) ;
  • 신유환 (한국과학기술연구원 열유동제어 센터)
  • Published : 2003.11.05

Abstract

In the present study, the performance characteristics and the number of stall cells during rotating stall of a centrifugal air compressor were experimentally investigated. If the flow coefficient is lower than 0.150, the static pressure at impeller inlet is higher than that at inlet duct And reverse flow is observed under these flow coefficient region. Maximum adiabatic efficiency is obtained for the tested compressor around flow coefficient 0.128, and it is independent of compressor rotating speed. The number of stall cells and their rotational speeds are distinctive features of the rotating stall phenomenon. The present study is mainly concerned with the number of stall cells and their rotational speeds. The interpretation method of visualization is based on the pressure distribution in the circumference pressure fields while plotting the pressure and its harmonics variations in time in polar coordinates.

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