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A reduced order model of unsteady flows in turbomachinery

Publication ,  Conference
Hall, KC; Florea, R; Lanzkron, PJ
Published in: Proceedings of the ASME Turbo Expo
January 1, 1994

A novel technique for computing unsteady flows about turbomachinery cascades is presented. Starting with a frequency domain CFD description of unsteady aerodynamic flows, we form a large, sparse, generalized, non-Hermitian eigenvalue problem which describes the natural modes and frequencies of fluid motion about the cascade. We compute the dominant left and right eigenmodes and corresponding eigenfrequencies using a Lanczos algorithm. Then, using just a few of the resulting eigenmodes, we construct a reduced order model of the unsteady flow field. With this model, one can rapidly and accurately predict the unsteady aerodynamic loads acting on the cascade over a wide range of reduced frequencies and arbitrary modes of vibration. Moreover, the eigenmode information provides insights into the physics of unsteady flows. Finally we note that the form of the reduced order model is well suited for use in active control of aeroelastic and aeroacoustic phenomena.

Duke Scholars

Published In

Proceedings of the ASME Turbo Expo

DOI

Publication Date

January 1, 1994

Volume

5
 

Citation

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Hall, K. C., Florea, R., & Lanzkron, P. J. (1994). A reduced order model of unsteady flows in turbomachinery. In Proceedings of the ASME Turbo Expo (Vol. 5). https://doi.org/10.1115/94-GT-291
Hall, K. C., R. Florea, and P. J. Lanzkron. “A reduced order model of unsteady flows in turbomachinery.” In Proceedings of the ASME Turbo Expo, Vol. 5, 1994. https://doi.org/10.1115/94-GT-291.
Hall KC, Florea R, Lanzkron PJ. A reduced order model of unsteady flows in turbomachinery. In: Proceedings of the ASME Turbo Expo. 1994.
Hall, K. C., et al. “A reduced order model of unsteady flows in turbomachinery.” Proceedings of the ASME Turbo Expo, vol. 5, 1994. Scopus, doi:10.1115/94-GT-291.
Hall KC, Florea R, Lanzkron PJ. A reduced order model of unsteady flows in turbomachinery. Proceedings of the ASME Turbo Expo. 1994.

Published In

Proceedings of the ASME Turbo Expo

DOI

Publication Date

January 1, 1994

Volume

5