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Nonlinear frequency-domain analysis of unsteady flows in turbomachinery with multiple excitation frequencies

Publication ,  Conference
Ekici, K; Hall, KC
Published in: Collection of Technical Papers - AIAA Applied Aerodynamics Conference
January 1, 2006

A harmonic balance technique for the analysis of nonlinear unsteady flows in turbomachiney arising from several excitation sources, possibly with frequencies with irrational ratios, is presented in this paper. This method uses a mixed time-domain/frequency-domain approach that allows one to model the blade row on a computational grid spanning just a single blade passage, no matter the interblade phase angles of the original disturbances. Using this approach, we compute several solutions, each one corresponding to one of several times over one period for periodic flows, or over a representative time interval for aperiodic flows. These time levels are coupled to each other through a spectral time derivative operator in the interior of the computational domain, and through the far-field and periodic boundary conditions around the boundary of the domain. In this paper, we apply the method to the two-dimensional Euler equations (although the method can be applied to three-dimensional and viscous flows), and examine the nonlinear interaction of wake passing with blade vibration.

Duke Scholars

Published In

Collection of Technical Papers - AIAA Applied Aerodynamics Conference

DOI

ISSN

1048-5953

Publication Date

January 1, 2006

Volume

1

Start / End Page

623 / 636
 

Citation

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Ekici, K., & Hall, K. C. (2006). Nonlinear frequency-domain analysis of unsteady flows in turbomachinery with multiple excitation frequencies. In Collection of Technical Papers - AIAA Applied Aerodynamics Conference (Vol. 1, pp. 623–636). https://doi.org/10.2514/6.2006-2995
Ekici, K., and K. C. Hall. “Nonlinear frequency-domain analysis of unsteady flows in turbomachinery with multiple excitation frequencies.” In Collection of Technical Papers - AIAA Applied Aerodynamics Conference, 1:623–36, 2006. https://doi.org/10.2514/6.2006-2995.
Ekici K, Hall KC. Nonlinear frequency-domain analysis of unsteady flows in turbomachinery with multiple excitation frequencies. In: Collection of Technical Papers - AIAA Applied Aerodynamics Conference. 2006. p. 623–36.
Ekici, K., and K. C. Hall. “Nonlinear frequency-domain analysis of unsteady flows in turbomachinery with multiple excitation frequencies.” Collection of Technical Papers - AIAA Applied Aerodynamics Conference, vol. 1, 2006, pp. 623–36. Scopus, doi:10.2514/6.2006-2995.
Ekici K, Hall KC. Nonlinear frequency-domain analysis of unsteady flows in turbomachinery with multiple excitation frequencies. Collection of Technical Papers - AIAA Applied Aerodynamics Conference. 2006. p. 623–636.

Published In

Collection of Technical Papers - AIAA Applied Aerodynamics Conference

DOI

ISSN

1048-5953

Publication Date

January 1, 2006

Volume

1

Start / End Page

623 / 636