Advertisement

A Non-synchronous Vibration of Moving Blades Coupled with the Bleed Chamber Resonance in an Axial Compressor

  • N. Yamaguchi
  • T. Sato
  • S. Umemura
  • T. Ohwaki
Conference paper

Abstract

In a low-speed model test of an axial compressor for a gas turbine, a new type of non-synchronous vibration of moving blades, which resonate at apparently non-integral orders of the machine rpm, was discovered and its cause was identified. The moving blades, which were located immediately upstream of a bleed slit and chamber, were excited by a flow oscillation through the slit due to the resonance or near-resonance of the air column within the bleed chamber, which, in turn, was excited by the rotor revolution. The resonance condition proved to be the following simple formula:
$$m{f_R} = \left| {{f_B} + {f_S}} \right|$$
where f R : rotor revolution frequency, f B : blade first bending frequency, f S : pressure fluctuation frequency of the bleed chamber resonance, and m: arbitrary integer.

Keywords

Axial Compressor Integral Order Predominant Frequency Model Compressor Resonant Vibration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag New York, Inc. 1993

Authors and Affiliations

  • N. Yamaguchi
    • 1
  • T. Sato
    • 1
  • S. Umemura
    • 1
  • T. Ohwaki
    • 1
  1. 1.Takasago R&D CenterMitsubishi Heavy Industries, Ltd.Takasago CityJapan

Personalised recommendations