Numerical Simulation of Low Engine Order Excitation in a Transonic Compressor

Abstract:

A full-annulus unsteady quasi-3D simulation for a transonic compressor was conducted to investigate the low engine order excitation sources. A special inlet total pressure distortion was used in the simulation to account for the effect of non-axisymmetric tip clearance. The unsteady aerodynamic forces were obtained by integrating the static pressure along the blade surface. Furthermore, the effect of downstream rotor detached shock on upstream stator was analyzed. It was shown that the unsteady aerodynamic excitation of the rotor was subjected to the first two harmonic frequencies of the inlet distortion, and the adjacent stators’ basic frequency and lower harmonics. It was found that the detached shock had a significant impact on the surface static pressure distribution of the upstream stators.

• Periodical: Advanced Materials Research (Volumes 546-547)
• Pages: 206-211
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.546-547.206
• Online since: July 2012
• Authors: Bo Zhang, Yang Wei Liu, Bao Jie Liu
• Keywords: Aerodynamic Excitation, Inlet Total Pressure Distortion, Low Engine Order

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