Investigation of periodic boundary conditions in multi-passage cascade flows using overset grids

Date

1998-01-01

Author

Tuncer, İsmail Hakkı
Sanz, Wolfgang

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Copyright © 1998 by ASME.A Navier-Stokes solution method with overset grids is applied to unsteady multi-passage cascade flows, and the unsteady blade loadings are compared against the single passage solutions with the direct store interblade boundary condition. In the overset grid solutions, the multipassage domain is discretized with O-type grids around each blade and a rectangular background grid. Blade grids are allowed to move in time relative to the background grid as prescribed by the oscillatory plunging motion. The overset grid method uses a simple, robust numerical algorithm to localize moving intergrid boundary points and to interpolate solution variables across grids. Computational results are presented for two and four passage, subsonic and transonic flows through a turbine and a compressor cascade. The overset grid solutions over the multi-passage periodic domains agree well with the single passage solutions and the experimental data. It is concluded that the time linearization error introduced by the direct store approach is negligible in the range of flow conditions studied.

Subject Keywords

Boundary value problems, Cascades, Blades, Algorithms, Compressors, Errors, Transonic flow, Turbines

URI

https://hdl.handle.net/11511/56261

DOI

https://doi.org/10.1115/98-gt-011

Conference Name

ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition

Collections

Department of Aerospace Engineering, Conference / Seminar

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Investigation of periodic boundary conditions in multi-passage cascade flows using overset grids Tuncer, İsmail Hakkı; Sanz, Wolfgang (1998-01-01) A Navier-Stokes solution method with overset grids is applied to unsteady multi-passage cascade flows, and the unsteady blade loadings are compared against the single passage solutions with the direct store interblade boundary condition. In the overset grid solutions, the multi-passage domain is discretized with O-type grids around each blade and a rectangular background grid. Blade grids are allowed to move in time relative to the background grid as prescribed by the oscillatory plunging motion. The overse...
Investigation of periodic boundary conditions in multipassage cascade flows using overset grids Tuncer, İsmail Hakkı; Sanz, W (ASME International, 1999-04-01) A Navier-Stokes solutions method with overset grids is applied to unsteady multipassage cascade flows, and the unsteady blade loadings are compared against the single-passage solutions with the direct store interblade boundary condition. In the overset grid solutions, the multipassage domain is discretized with O-type grids around each blade and a rectangular background grid. Blade grids are allowed to move in time relative to the background grid as prescribed by the oscillatory plunging motion. The overset...
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Citation Formats

İ. H. Tuncer and W. Sanz, “Investigation of periodic boundary conditions in multi-passage cascade flows using overset grids,” Stockholm, Sweden, 1998, vol. 1, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56261.