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Mistuned higher-order mode forced response of an embedded compressor rotor-Part II: Mistuned forced response prediction

Publication ,  Journal Article
Li, J; Aye-Addo, N; Kielb, R; Key, N
Published in: Journal of Turbomachinery
March 1, 2018

This paper is the second part of a two-part paper that presents a comprehensive study of the higher-order mode (HOM) mistuned forced response of an embedded rotor blisk in a multistage axial research compressor. The resonant response of the second-stage rotor (R2) in its first chordwise bending (1CWB) mode due to the second harmonic of the periodic passing of its neighboring stators (S1 and S2) is investigated computationally and experimentally at three steady loading conditions in the Purdue three-stage compressor research facility. A nonintrusive stress measurement system (NSMS, or blade tip-timing) is used to measure the blade vibration. Two reduced-order mistuning models of different levels of fidelity are used, namely, the fundamental mistuning model (FMM) and the component mode mistuning (CMM), to predict the response. Although several modes in the 1CWB modal family appear in frequency veering and high modal density regions, they do not heavily participate in the response such that very similar results are produced by the FMM and the CMM models of different sizes. A significant response amplification factor of 1.5-2.0 is both measured and predicted, which is on the same order of magnitude of what was commonly reported for low-frequency modes. In this study, a good agreement between predictions and measurements is achieved for the deterministic analysis. This is complemented by a sensitivity analysis which shows that the mistuned system is highly sensitive to the discrepancies in the experimentally determined blade frequency mistuning.

Duke Scholars

Published In

Journal of Turbomachinery

DOI

EISSN

1528-8900

ISSN

0889-504X

Publication Date

March 1, 2018

Volume

140

Issue

3

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4012 Fluid mechanics and thermal engineering
  • 4001 Aerospace engineering
  • 0913 Mechanical Engineering
  • 0901 Aerospace Engineering
 

Citation

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ICMJE
MLA
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Li, J., Aye-Addo, N., Kielb, R., & Key, N. (2018). Mistuned higher-order mode forced response of an embedded compressor rotor-Part II: Mistuned forced response prediction. Journal of Turbomachinery, 140(3). https://doi.org/10.1115/1.4038519
Li, J., N. Aye-Addo, R. Kielb, and N. Key. “Mistuned higher-order mode forced response of an embedded compressor rotor-Part II: Mistuned forced response prediction.” Journal of Turbomachinery 140, no. 3 (March 1, 2018). https://doi.org/10.1115/1.4038519.
Li J, Aye-Addo N, Kielb R, Key N. Mistuned higher-order mode forced response of an embedded compressor rotor-Part II: Mistuned forced response prediction. Journal of Turbomachinery. 2018 Mar 1;140(3).
Li, J., et al. “Mistuned higher-order mode forced response of an embedded compressor rotor-Part II: Mistuned forced response prediction.” Journal of Turbomachinery, vol. 140, no. 3, Mar. 2018. Scopus, doi:10.1115/1.4038519.
Li J, Aye-Addo N, Kielb R, Key N. Mistuned higher-order mode forced response of an embedded compressor rotor-Part II: Mistuned forced response prediction. Journal of Turbomachinery. 2018 Mar 1;140(3).

Published In

Journal of Turbomachinery

DOI

EISSN

1528-8900

ISSN

0889-504X

Publication Date

March 1, 2018

Volume

140

Issue

3

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4012 Fluid mechanics and thermal engineering
  • 4001 Aerospace engineering
  • 0913 Mechanical Engineering
  • 0901 Aerospace Engineering