Article | REF: BM4220 V1

Turbomachines: calculation of incompressible flows - Theoretical support and numerical simulation

Authors: Robert REY, Gérard BOIS, Farid BAKIR, Sofiane KHELLADI

Publication date: October 10, 2009

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5. Quasi-three-dimensional model

The quasi-tridimensional model, or 2.5 D model, consists in decomposing the three-dimensional flow into two coupled two-dimensional flows: one consisting of meridian flow (r, z ) and the other of vane-to-vein flow (m, q ).

5.1 Medium meridian flow

The assumptions used to study meridional flow are as follows:

  • it is assumed to be in permanent relative motion:

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Quasi-three-dimensional model