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1 TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
1 Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

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CFD modelling of turbine stage stator/rotor interaction

Świdyrczuk J.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

2006

Vol. 10, No 2

113-124

Issues related to numerical analyses of turbine stage stator/rotor interactions are disceussed, with special focus on the selection of grid parameters to secure proper modelling of the stator wake's dissipation. Unsteady calculations of the flow through a high-pressure turbine stage, based on 3D ORANS equations, are employed in the grid resolution analysis. Their results are compared with those obtained with other methods, both developed by the author or available in the literature. As a result, the 3D grid resolution of the order of 2000000 cells per one stator and/or one rotor passage has been determined as the necessary minimum for properly modelling the dissipation of the stator's wake on its war through the rotor's cascade, under the circumstances determined by the used CFD code. A generalization of this result is proposed.

Stator Wake Dissipation in the Turbine Rotor Passage

Świrydczuk J.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2005

nr 128, vol. 2

531-538

The paper discusses the effect of grid resolution on proper modelling of dissipation of the stator wake on its way through the rotor passage. Comparison is made between solutions, our own and available in the literature, of the stator/rotor interaction calculated using different RANS codes. The reference material consists of experimental data and those obtained with the aid of the vortex dynamics theory (VDT). The final conclusion of the study suggests grid resolution ranges that may produce wake dissipation patterns acceptable from the point of view of accuracy and time consumption.